diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index d362d9c..daa132b 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -2,6 +2,8 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/__non-book-expirements__/ctof" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/__non-book-expirements__/ftoc" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/branches" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/ctof" vcs="Git" />
     <mapping directory="$PROJECT_DIR$/enums" vcs="Git" />
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c449cb2..19b7c83 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,7 +2,18 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="c8f42924-1cd2-4b1c-bcff-602a3368bb16" name="Default Changelist" comment="">
-      <change beforePath="$PROJECT_DIR$/factorial/src/main.rs" beforeDir="false" afterPath="$PROJECT_DIR$/factorial/src/main.rs" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/vcs.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/vcs.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/ctof/.gitignore" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/ctof/Cargo.toml" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/ctof/src/main.rs" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/factorial/Cargo.toml" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/factorial/src/main.rs" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/fibonacci/Cargo.toml" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/fibonacci/src/main.rs" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/ftoc/.gitignore" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/ftoc/Cargo.toml" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/ftoc/src/main.rs" beforeDir="false" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
@@ -11,53 +22,7 @@
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
   <component name="FileEditorManager">
-    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/fibonacci/src/main.rs">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="96">
-              <caret line="6" selection-start-line="6" selection-end-line="6" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/fibonacci/Cargo.toml">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="128">
-              <caret line="8" selection-start-line="8" selection-end-line="8" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/factorial/src/main.rs">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="448">
-              <caret line="28" column="56" lean-forward="true" selection-start-line="28" selection-start-column="56" selection-end-line="28" selection-end-column="56" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/old_lady_who_swallowed_a_fly/src/main.rs">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="375">
-              <caret line="35" column="12" selection-start-line="35" selection-start-column="12" selection-end-line="35" selection-end-column="12" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/factorial/Cargo.toml">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="128">
-              <caret line="8" selection-start-line="8" selection-end-line="8" />
-            </state>
-          </provider>
-        </entry>
-      </file>
-    </leaf>
+    <leaf />
   </component>
   <component name="FileTemplateManagerImpl">
     <option name="RECENT_TEMPLATES">
@@ -149,11 +114,11 @@
     <annotation-enable>false</annotation-enable>
     <other-services-enabled>false</other-services-enabled>
   </component>
-  <component name="ProjectFrameBounds">
-    <option name="x" value="1680" />
-    <option name="y" value="-410" />
-    <option name="width" value="1050" />
-    <option name="height" value="1657" />
+  <component name="ProjectFrameBounds" extendedState="6">
+    <option name="x" value="1949" />
+    <option name="y" value="-372" />
+    <option name="width" value="1073" />
+    <option name="height" value="1837" />
   </component>
   <component name="ProjectLevelVcsManager" settingsEditedManually="true">
     <ConfirmationsSetting value="1" id="Add" />
@@ -163,7 +128,6 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
-      <pane id="PackagesPane" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
@@ -186,6 +150,7 @@
           <select />
         </subPane>
       </pane>
+      <pane id="PackagesPane" />
       <pane id="Scope">
         <subPane subId="Scope 'Project Files'; set:Project Files; class com.intellij.psi.search.scope.ProjectFilesScope">
           <expand>
@@ -193,55 +158,6 @@
               <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
               <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
             </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="factorial" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="factorial" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-              <item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="fibonacci" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="guessing_game" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="guessing_game" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-              <item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="old_lady_who_swallowed_a_fly" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="old_lady_who_swallowed_a_fly" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-              <item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="twelve_days_of_christmas" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
-            <path>
-              <item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
-              <item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
-              <item name="twelve_days_of_christmas" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-              <item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
-            </path>
           </expand>
           <select />
         </subPane>
@@ -250,7 +166,7 @@
   </component>
   <component name="PropertiesComponent">
     <property name="JavaScriptWeakerCompletionTypeGuess" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1550853816898" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1550864691211" />
     <property name="javascript.nodejs.core.library.configured.version" value="7.1.0" />
     <property name="js.eslint.eslintPackage" value="$USER_HOME$/.yarn-config/global/node_modules/.bin/eslint" />
     <property name="js.eslint.nodeInterpreter" value="project" />
@@ -403,10 +319,10 @@
     </history-entry>
   </component>
   <component name="ToolWindowManager">
-    <frame x="1680" y="-410" width="1050" height="1657" extended-state="6" />
+    <frame x="1920" y="-438" width="1080" height="1897" extended-state="6" />
     <layout>
-      <window_info content_ui="combo" id="Project" order="0" sideWeight="0.49460256" visible="true" weight="0.26141885" />
-      <window_info id="Structure" order="1" sideWeight="0.50539744" side_tool="true" visible="true" weight="0.26141885" />
+      <window_info active="true" content_ui="combo" id="Project" order="0" sideWeight="0.4941308" visible="true" weight="0.2540132" />
+      <window_info id="Structure" order="1" sideWeight="0.5058692" side_tool="true" visible="true" weight="0.2540132" />
       <window_info id="Image Layers" order="2" />
       <window_info id="Designer" order="3" />
       <window_info id="Capture Tool" order="4" />
@@ -422,7 +338,7 @@
       <window_info anchor="bottom" id="Docker" order="7" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" order="8" />
       <window_info anchor="bottom" id="Inspection Results" order="9" weight="0.32979318" />
-      <window_info active="true" anchor="bottom" id="Terminal" order="10" visible="true" weight="0.34215623" />
+      <window_info anchor="bottom" id="Terminal" order="10" weight="0.34215623" />
       <window_info anchor="bottom" id="Event Log" order="11" side_tool="true" />
       <window_info anchor="right" id="Commander" order="0" weight="0.4" />
       <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
@@ -436,20 +352,6 @@
     <option name="version" value="1" />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/minigrep_v2/Cargo.toml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="112">
-          <caret line="7" selection-start-line="7" selection-end-line="7" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/minigrep_v2/src/main.rs">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="272">
-          <caret line="17" selection-start-line="17" selection-end-line="17" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/minigrep_v2/src/lib.rs">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="624">
@@ -817,38 +719,22 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/fibonacci/Cargo.toml">
+    <entry file="file://$PROJECT_DIR$/factorial/Cargo.toml" />
+    <entry file="file://$PROJECT_DIR$/fibonacci/src/main.rs" />
+    <entry file="file://$PROJECT_DIR$/functions/src/main.rs">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="128">
-          <caret line="8" selection-start-line="8" selection-end-line="8" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/factorial/Cargo.toml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="128">
-          <caret line="8" selection-start-line="8" selection-end-line="8" />
+        <state relative-caret-position="160">
+          <caret line="10" lean-forward="true" selection-start-line="10" selection-end-line="10" />
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/ftoc/src/main.rs" />
+    <entry file="file://$PROJECT_DIR$/factorial/src/main.rs" />
+    <entry file="file://$PROJECT_DIR$/fibonacci/Cargo.toml" />
     <entry file="file://$PROJECT_DIR$/old_lady_who_swallowed_a_fly/src/main.rs">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="375">
-          <caret line="35" column="12" selection-start-line="35" selection-start-column="12" selection-end-line="35" selection-end-column="12" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/fibonacci/src/main.rs">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="96">
-          <caret line="6" selection-start-line="6" selection-end-line="6" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/factorial/src/main.rs">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="448">
-          <caret line="28" column="56" lean-forward="true" selection-start-line="28" selection-start-column="56" selection-end-line="28" selection-end-column="56" />
+        <state relative-caret-position="1184">
+          <caret line="74" lean-forward="true" selection-start-line="74" selection-end-line="74" />
         </state>
       </provider>
     </entry>
diff --git a/ctof/.gitignore b/__non-book-expirements__/ctof/.gitignore
similarity index 100%
rename from ctof/.gitignore
rename to __non-book-expirements__/ctof/.gitignore
diff --git a/ctof/Cargo.toml b/__non-book-expirements__/ctof/Cargo.toml
similarity index 100%
rename from ctof/Cargo.toml
rename to __non-book-expirements__/ctof/Cargo.toml
diff --git a/ctof/src/main.rs b/__non-book-expirements__/ctof/src/main.rs
similarity index 100%
rename from ctof/src/main.rs
rename to __non-book-expirements__/ctof/src/main.rs
diff --git a/factorial/Cargo.toml b/__non-book-expirements__/factorial/Cargo.toml
similarity index 100%
rename from factorial/Cargo.toml
rename to __non-book-expirements__/factorial/Cargo.toml
diff --git a/factorial/src/main.rs b/__non-book-expirements__/factorial/src/main.rs
similarity index 100%
rename from factorial/src/main.rs
rename to __non-book-expirements__/factorial/src/main.rs
diff --git a/fibonacci/Cargo.toml b/__non-book-expirements__/fibonacci/Cargo.toml
similarity index 100%
rename from fibonacci/Cargo.toml
rename to __non-book-expirements__/fibonacci/Cargo.toml
diff --git a/fibonacci/src/main.rs b/__non-book-expirements__/fibonacci/src/main.rs
similarity index 100%
rename from fibonacci/src/main.rs
rename to __non-book-expirements__/fibonacci/src/main.rs
diff --git a/ftoc/.gitignore b/__non-book-expirements__/ftoc/.gitignore
similarity index 100%
rename from ftoc/.gitignore
rename to __non-book-expirements__/ftoc/.gitignore
diff --git a/ftoc/Cargo.toml b/__non-book-expirements__/ftoc/Cargo.toml
similarity index 100%
rename from ftoc/Cargo.toml
rename to __non-book-expirements__/ftoc/Cargo.toml
diff --git a/ftoc/src/main.rs b/__non-book-expirements__/ftoc/src/main.rs
similarity index 100%
rename from ftoc/src/main.rs
rename to __non-book-expirements__/ftoc/src/main.rs
diff --git a/old_lady_who_swallowed_a_fly/Cargo.toml b/__non-book-expirements__/old_lady_who_swallowed_a_fly/Cargo.toml
similarity index 100%
rename from old_lady_who_swallowed_a_fly/Cargo.toml
rename to __non-book-expirements__/old_lady_who_swallowed_a_fly/Cargo.toml
diff --git a/old_lady_who_swallowed_a_fly/src/main.rs b/__non-book-expirements__/old_lady_who_swallowed_a_fly/src/main.rs
similarity index 100%
rename from old_lady_who_swallowed_a_fly/src/main.rs
rename to __non-book-expirements__/old_lady_who_swallowed_a_fly/src/main.rs
diff --git a/twelve_days_of_christmas/Cargo.toml b/__non-book-expirements__/twelve_days_of_christmas/Cargo.toml
similarity index 100%
rename from twelve_days_of_christmas/Cargo.toml
rename to __non-book-expirements__/twelve_days_of_christmas/Cargo.toml
diff --git a/twelve_days_of_christmas/src/main.rs b/__non-book-expirements__/twelve_days_of_christmas/src/main.rs
similarity index 100%
rename from twelve_days_of_christmas/src/main.rs
rename to __non-book-expirements__/twelve_days_of_christmas/src/main.rs