diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index 62d2967..1aad79f 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -72,6 +72,10 @@
           <option value="E501" />
           <option value="W29" />
           <option value="E501" />
+          <option value="W29" />
+          <option value="E501" />
+          <option value="W29" />
+          <option value="E501" />
         </list>
       </option>
     </inspection_tool>
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index dbabf97..530c665 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,12 +2,8 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="7106b959-52c5-4d26-9f5a-8703a78c8c29" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/challenges118-123/challenge-118.py" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/challenges118-123/challenge-119.py" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/challenges118-123/challenge-120.py" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/challenges118-123/challenge-121.py" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/challenges118-123/challenge-122.py" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/challenges118-123/challenge-123.py" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/challenges139-145/challenge-139.py" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/commands" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/inspectionProfiles/Project_Default.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/inspectionProfiles/Project_Default.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
     </list>
@@ -18,75 +14,21 @@
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
   <component name="FileEditorManager">
-    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
+    <leaf>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/challenges111-117/challenge-116.py">
+        <entry file="file://$PROJECT_DIR$/commands">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="440">
-              <caret line="35" selection-start-line="35" selection-end-line="39" selection-end-column="18" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-118.py">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="150">
-              <caret line="10" selection-start-line="10" selection-end-line="10" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-119.py">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="540">
-              <caret line="36" lean-forward="true" selection-start-line="36" selection-end-line="36" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-120.py">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="375">
-              <caret line="31" column="4" selection-start-line="31" selection-start-column="4" selection-end-line="31" selection-end-column="24" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-121.py">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="195">
-              <caret line="28" selection-start-line="28" selection-end-line="46" selection-end-column="53" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-122.py">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="525">
-              <caret line="35" column="15" selection-end-line="39" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-123.py">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="510">
-              <caret line="34" column="73" selection-start-line="34" selection-start-column="73" selection-end-line="34" selection-end-column="73" />
+            <state relative-caret-position="30">
+              <caret line="2" selection-start-line="2" selection-end-line="2" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/challenges118-123/Salaries.csv">
+        <entry file="file://$PROJECT_DIR$/challenges139-145/challenge-139.py">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="30">
-              <caret line="2" lean-forward="true" selection-start-line="2" selection-end-line="2" />
+            <state relative-caret-position="180">
+              <caret line="12" selection-start-line="12" selection-end-line="12" />
             </state>
           </provider>
         </entry>
@@ -114,16 +56,9 @@
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
-        <option value="$PROJECT_DIR$/challenges111-117/Books.csv" />
-        <option value="$PROJECT_DIR$/challenges111-117/challenge-116.py" />
-        <option value="$PROJECT_DIR$/challenges111-117/challenge-117.py" />
-        <option value="$PROJECT_DIR$/challenges118-123/challenge-118.py" />
-        <option value="$PROJECT_DIR$/challenges118-123/challenge-119.py" />
-        <option value="$PROJECT_DIR$/challenges118-123/challenge-120.py" />
-        <option value="$PROJECT_DIR$/challenges118-123/challenge-121.py" />
-        <option value="$PROJECT_DIR$/challenges118-123/challenge-122.py" />
-        <option value="$PROJECT_DIR$/challenges118-123/challenge-123.py" />
-        <option value="$PROJECT_DIR$/challenges118-123/Salaries.csv" />
+        <option value="$PROJECT_DIR$/challenges124-132/challenge-124.py" />
+        <option value="$PROJECT_DIR$/commands" />
+        <option value="$PROJECT_DIR$/challenges139-145/challenge-139.py" />
       </list>
     </option>
   </component>
@@ -147,16 +82,6 @@
               <item name="paython-by-learn" type="b2602c69:ProjectViewProjectNode" />
               <item name="paython-by-learn" type="462c0819:PsiDirectoryNode" />
             </path>
-            <path>
-              <item name="paython-by-learn" type="b2602c69:ProjectViewProjectNode" />
-              <item name="paython-by-learn" type="462c0819:PsiDirectoryNode" />
-              <item name="challenges111-117" type="462c0819:PsiDirectoryNode" />
-            </path>
-            <path>
-              <item name="paython-by-learn" type="b2602c69:ProjectViewProjectNode" />
-              <item name="paython-by-learn" type="462c0819:PsiDirectoryNode" />
-              <item name="challenges118-123" type="462c0819:PsiDirectoryNode" />
-            </path>
           </expand>
           <select />
         </subPane>
@@ -200,7 +125,7 @@
       </list>
     </option>
   </component>
-  <component name="RunManager" selected="Python.challenge-123">
+  <component name="RunManager" selected="Python.challenge-139">
     <configuration default="true" type="PythonConfigurationType" factoryName="Python">
       <module name="paython-by-learn" />
       <option name="INTERPRETER_OPTIONS" value="" />
@@ -223,48 +148,13 @@
       <option name="INPUT_FILE" value="" />
       <method v="2" />
     </configuration>
-    <configuration name="challenge-119" type="PythonConfigurationType" factoryName="Python" temporary="true">
-      <module name="paython-by-learn" />
-      <option name="INTERPRETER_OPTIONS" value="" />
-      <option name="PARENT_ENVS" value="true" />
-      <option name="SDK_HOME" value="" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/challenges118-123" />
-      <option name="IS_MODULE_SDK" value="true" />
-      <option name="ADD_CONTENT_ROOTS" value="true" />
-      <option name="ADD_SOURCE_ROOTS" value="true" />
-      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
-      <option name="SCRIPT_NAME" value="$PROJECT_DIR$/challenges118-123/challenge-119.py" />
-      <option name="PARAMETERS" value="" />
-      <option name="SHOW_COMMAND_LINE" value="true" />
-      <option name="EMULATE_TERMINAL" value="false" />
-      <option name="MODULE_MODE" value="false" />
-      <option name="REDIRECT_INPUT" value="false" />
-      <option name="INPUT_FILE" value="" />
-      <method v="2" />
-    </configuration>
-    <configuration name="challenge-120" type="PythonConfigurationType" factoryName="Python" temporary="true">
-      <module name="paython-by-learn" />
-      <option name="INTERPRETER_OPTIONS" value="" />
-      <option name="PARENT_ENVS" value="true" />
-      <option name="SDK_HOME" value="" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/challenges118-123" />
-      <option name="IS_MODULE_SDK" value="true" />
-      <option name="ADD_CONTENT_ROOTS" value="true" />
-      <option name="ADD_SOURCE_ROOTS" value="true" />
-      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
-      <option name="SCRIPT_NAME" value="$PROJECT_DIR$/challenges118-123/challenge-120.py" />
-      <option name="PARAMETERS" value="" />
-      <option name="SHOW_COMMAND_LINE" value="true" />
-      <option name="EMULATE_TERMINAL" value="false" />
-      <option name="MODULE_MODE" value="false" />
-      <option name="REDIRECT_INPUT" value="false" />
-      <option name="INPUT_FILE" value="" />
-      <method v="2" />
-    </configuration>
     <configuration name="challenge-121" type="PythonConfigurationType" factoryName="Python" temporary="true">
       <module name="paython-by-learn" />
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
+      <envs>
+        <env name="PYTHONUNBUFFERED" value="1" />
+      </envs>
       <option name="SDK_HOME" value="" />
       <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/challenges118-123" />
       <option name="IS_MODULE_SDK" value="true" />
@@ -284,6 +174,9 @@
       <module name="paython-by-learn" />
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
+      <envs>
+        <env name="PYTHONUNBUFFERED" value="1" />
+      </envs>
       <option name="SDK_HOME" value="" />
       <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/challenges118-123" />
       <option name="IS_MODULE_SDK" value="true" />
@@ -303,6 +196,9 @@
       <module name="paython-by-learn" />
       <option name="INTERPRETER_OPTIONS" value="" />
       <option name="PARENT_ENVS" value="true" />
+      <envs>
+        <env name="PYTHONUNBUFFERED" value="1" />
+      </envs>
       <option name="SDK_HOME" value="" />
       <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/challenges118-123" />
       <option name="IS_MODULE_SDK" value="true" />
@@ -318,13 +214,51 @@
       <option name="INPUT_FILE" value="" />
       <method v="2" />
     </configuration>
+    <configuration name="challenge-124" type="PythonConfigurationType" factoryName="Python" temporary="true">
+      <module name="paython-by-learn" />
+      <option name="INTERPRETER_OPTIONS" value="" />
+      <option name="PARENT_ENVS" value="true" />
+      <option name="SDK_HOME" value="" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/challenges124-132" />
+      <option name="IS_MODULE_SDK" value="true" />
+      <option name="ADD_CONTENT_ROOTS" value="true" />
+      <option name="ADD_SOURCE_ROOTS" value="true" />
+      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
+      <option name="SCRIPT_NAME" value="$PROJECT_DIR$/challenges124-132/challenge-124.py" />
+      <option name="PARAMETERS" value="" />
+      <option name="SHOW_COMMAND_LINE" value="true" />
+      <option name="EMULATE_TERMINAL" value="false" />
+      <option name="MODULE_MODE" value="false" />
+      <option name="REDIRECT_INPUT" value="false" />
+      <option name="INPUT_FILE" value="" />
+      <method v="2" />
+    </configuration>
+    <configuration name="challenge-139" type="PythonConfigurationType" factoryName="Python" temporary="true">
+      <module name="paython-by-learn" />
+      <option name="INTERPRETER_OPTIONS" value="" />
+      <option name="PARENT_ENVS" value="true" />
+      <option name="SDK_HOME" value="" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/challenges139-145" />
+      <option name="IS_MODULE_SDK" value="true" />
+      <option name="ADD_CONTENT_ROOTS" value="true" />
+      <option name="ADD_SOURCE_ROOTS" value="true" />
+      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
+      <option name="SCRIPT_NAME" value="$PROJECT_DIR$/challenges139-145/challenge-139.py" />
+      <option name="PARAMETERS" value="" />
+      <option name="SHOW_COMMAND_LINE" value="true" />
+      <option name="EMULATE_TERMINAL" value="false" />
+      <option name="MODULE_MODE" value="false" />
+      <option name="REDIRECT_INPUT" value="false" />
+      <option name="INPUT_FILE" value="" />
+      <method v="2" />
+    </configuration>
     <recent_temporary>
       <list>
+        <item itemvalue="Python.challenge-139" />
+        <item itemvalue="Python.challenge-124" />
         <item itemvalue="Python.challenge-123" />
         <item itemvalue="Python.challenge-122" />
         <item itemvalue="Python.challenge-121" />
-        <item itemvalue="Python.challenge-120" />
-        <item itemvalue="Python.challenge-119" />
       </list>
     </recent_temporary>
   </component>
@@ -342,6 +276,8 @@
       <workItem from="1564909882780" duration="227000" />
       <workItem from="1564910149868" duration="6468000" />
       <workItem from="1564917264092" duration="216000" />
+      <workItem from="1565005915966" duration="256000" />
+      <workItem from="1565006355001" duration="371000" />
     </task>
     <servers />
   </component>
@@ -349,8 +285,13 @@
     <frame x="-1" y="-4" width="1922" height="1085" extended-state="6" />
     <editor active="true" />
     <layout>
-      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.24301529" />
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.24986821" />
       <window_info id="Structure" order="1" weight="0.25" />
+      <window_info anchor="bottom" id="Educational.CheckDetails" />
+      <window_info anchor="bottom" id="Version Control" />
+      <window_info anchor="bottom" id="Terminal" weight="0.3294979" />
+      <window_info anchor="bottom" id="Event Log" side_tool="true" />
+      <window_info anchor="bottom" id="Python Console" visible="true" weight="0.3294979" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" />
       <window_info anchor="bottom" id="Run" order="2" />
@@ -358,11 +299,6 @@
       <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
       <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
       <window_info anchor="bottom" id="TODO" order="6" />
-      <window_info anchor="bottom" id="Version Control" order="7" />
-      <window_info anchor="bottom" id="Educational.CheckDetails" order="8" />
-      <window_info anchor="bottom" id="Terminal" order="9" />
-      <window_info anchor="bottom" id="Event Log" order="10" side_tool="true" />
-      <window_info anchor="bottom" id="Python Console" order="11" visible="true" weight="0.31276152" />
       <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
       <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
       <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
@@ -417,85 +353,27 @@
     <MESSAGE value="8th day of python challenges 105-110" />
     <MESSAGE value="8th day of python challenges 111" />
     <MESSAGE value="8th day of python challenges 111-117" />
-    <option name="LAST_COMMIT_MESSAGE" value="8th day of python challenges 111-117" />
+    <MESSAGE value="9th day of python challenges 118-123" />
+    <option name="LAST_COMMIT_MESSAGE" value="9th day of python challenges 118-123" />
   </component>
   <component name="com.intellij.coverage.CoverageDataManagerImpl">
     <SUITE FILE_PATH="coverage/paython_by_learn$challenge_039.coverage" NAME="challenge-039 Coverage Results" MODIFIED="1563282890417" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="coverage.py" COVERAGE_BY_TEST_ENABLED="true" COVERAGE_TRACING_ENABLED="false" WORKING_DIRECTORY="$PROJECT_DIR$/challenges35-44" />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/challenges111-117/Books.csv">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="75">
-          <caret line="5" column="36" selection-start-line="5" selection-start-column="36" selection-end-line="5" selection-end-column="36" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges111-117/QuizScore.csv">
+    <entry file="file://$PROJECT_DIR$/challenges124-132/challenge-124.py">
       <provider selected="true" editor-type-id="text-editor" />
     </entry>
-    <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-119.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="540">
-          <caret line="36" lean-forward="true" selection-start-line="36" selection-end-line="36" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges111-117/challenge-117.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="90">
-          <caret line="6" selection-start-line="6" selection-end-line="9" selection-end-column="83" />
-          <folding>
-            <element signature="e#0#10#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-118.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="150">
-          <caret line="10" selection-start-line="10" selection-end-line="10" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-120.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="375">
-          <caret line="31" column="4" selection-start-line="31" selection-start-column="4" selection-end-line="31" selection-end-column="24" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-121.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="195">
-          <caret line="28" selection-start-line="28" selection-end-line="46" selection-end-column="53" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-122.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="525">
-          <caret line="35" column="15" selection-end-line="39" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges111-117/challenge-116.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="440">
-          <caret line="35" selection-start-line="35" selection-end-line="39" selection-end-column="18" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges118-123/challenge-123.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="510">
-          <caret line="34" column="73" selection-start-line="34" selection-start-column="73" selection-end-line="34" selection-end-column="73" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/challenges118-123/Salaries.csv">
+    <entry file="file://$PROJECT_DIR$/commands">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="30">
-          <caret line="2" lean-forward="true" selection-start-line="2" selection-end-line="2" />
+          <caret line="2" selection-start-line="2" selection-end-line="2" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/challenges139-145/challenge-139.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="180">
+          <caret line="12" selection-start-line="12" selection-end-line="12" />
         </state>
       </provider>
     </entry>
diff --git a/challenges139-145/challenge-139.py b/challenges139-145/challenge-139.py
new file mode 100644
index 0000000..cb19e0c
--- /dev/null
+++ b/challenges139-145/challenge-139.py
@@ -0,0 +1,12 @@
+import sqlite3
+
+with sqlite3.connect('python-by-example') as db:
+    cursor = db.cursor()
+    cursor.execute("""CREATE TABLE IF NOT EXISTS employees(
+                                                    id integer PRIMARY KEY,
+                                                    name text NOT NULL,
+                                                    dept text NOT NULL,
+                                                    salary integer);""")
+    cursor.execute("""INSERT INTO employees(id,name,dept,salary)
+                        VALUES("1","Bob","Sales","25000")""")
+    db.commit()
diff --git a/commands b/commands
new file mode 100644
index 0000000..a7decc9
--- /dev/null
+++ b/commands
@@ -0,0 +1,3 @@
+sudo apt-get install python3-tk
+sudo apt install sqlite
+