diff --git a/.idea/workspace.xml b/.idea/workspace.xml
new file mode 100644
index 0000000..5fc82af
--- /dev/null
+++ b/.idea/workspace.xml
@@ -0,0 +1,208 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="cf3acfb6-e417-4a27-8f95-1ca376baff51" name="Default" comment="">
+      <change beforePath="$PROJECT_DIR$/lib/meta.js" beforeDir="false" afterPath="$PROJECT_DIR$/lib/meta.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/quantifier.js" beforeDir="false" afterPath="$PROJECT_DIR$/lib/quantifier.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/split.js" beforeDir="false" afterPath="$PROJECT_DIR$/lib/split.js" afterDir="false" />
+    </list>
+    <ignored path="$PROJECT_DIR$/.tmp/" />
+    <ignored path="$PROJECT_DIR$/temp/" />
+    <ignored path="$PROJECT_DIR$/tmp/" />
+    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
+    <option name="TRACKING_ENABLED" value="true" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="FileEditorManager">
+    <leaf>
+      <file leaf-file-name="test.js" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/test/test.js">
+          <provider selected="true" editor-type-id="text-editor" />
+        </entry>
+      </file>
+      <file leaf-file-name="meta.js" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/lib/meta.js">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="46">
+              <caret line="2" column="28" selection-start-line="2" selection-start-column="28" selection-end-line="2" selection-end-column="28" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="quantifier.js" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/lib/quantifier.js">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="69">
+              <caret line="3" column="20" selection-start-line="3" selection-start-column="20" selection-end-line="3" selection-end-column="20" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="split.js" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/lib/split.js">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="69">
+              <caret line="3" column="18" lean-forward="true" selection-start-line="3" selection-start-column="18" selection-end-line="3" selection-end-column="18" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+    </leaf>
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
+  <component name="IdeDocumentHistory">
+    <option name="CHANGED_PATHS">
+      <list>
+        <option value="$PROJECT_DIR$/lib/split.js" />
+        <option value="$PROJECT_DIR$/lib/quantifier.js" />
+        <option value="$PROJECT_DIR$/lib/meta.js" />
+      </list>
+    </option>
+  </component>
+  <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER">
+    <package-json value="$PROJECT_DIR$/package.json" />
+  </component>
+  <component name="JsGulpfileManager">
+    <detection-done>true</detection-done>
+    <sorting>DEFINITION_ORDER</sorting>
+  </component>
+  <component name="NodePackageJsonFileManager">
+    <packageJsonPaths>
+      <path value="$PROJECT_DIR$/package.json" />
+    </packageJsonPaths>
+  </component>
+  <component name="ProjectFrameBounds">
+    <option name="x" value="379" />
+    <option name="y" value="23" />
+    <option name="width" value="1061" />
+    <option name="height" value="797" />
+  </component>
+  <component name="ProjectView">
+    <navigator proportions="" version="1">
+      <foldersAlwaysOnTop value="true" />
+    </navigator>
+    <panes>
+      <pane id="ProjectPane">
+        <subPane>
+          <expand>
+            <path>
+              <item name="exercise6" type="b2602c69:ProjectViewProjectNode" />
+              <item name="exercise6" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="exercise6" type="b2602c69:ProjectViewProjectNode" />
+              <item name="exercise6" type="462c0819:PsiDirectoryNode" />
+              <item name="lib" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="exercise6" type="b2602c69:ProjectViewProjectNode" />
+              <item name="exercise6" type="462c0819:PsiDirectoryNode" />
+              <item name="test" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
+          <select />
+        </subPane>
+      </pane>
+      <pane id="Scope" />
+    </panes>
+  </component>
+  <component name="PropertiesComponent">
+    <property name="WebServerToolWindowFactoryState" value="false" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
+    <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
+    <property name="nodejs_npm_path_reset_for_default_project" value="true" />
+    <property name="nodejs_package_manager_path" value="npm" />
+    <property name="settings.editor.selected.configurable" value="copyright.filetypes.ActionScript" />
+  </component>
+  <component name="RunDashboard">
+    <option name="ruleStates">
+      <list>
+        <RuleState>
+          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
+        </RuleState>
+        <RuleState>
+          <option name="name" value="StatusDashboardGroupingRule" />
+        </RuleState>
+      </list>
+    </option>
+  </component>
+  <component name="SvnConfiguration">
+    <configuration />
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="cf3acfb6-e417-4a27-8f95-1ca376baff51" name="Default" comment="" />
+      <created>1543127606868</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1543127606868</updated>
+      <workItem from="1543127608008" duration="561000" />
+    </task>
+    <servers />
+  </component>
+  <component name="TimeTrackingManager">
+    <option name="totallyTimeSpent" value="561000" />
+  </component>
+  <component name="ToolWindowManager">
+    <frame x="379" y="23" width="1061" height="797" extended-state="0" />
+    <editor active="true" />
+    <layout>
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.25" />
+      <window_info anchor="bottom" id="TODO" order="6" />
+      <window_info anchor="bottom" id="Docker" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Event Log" side_tool="true" />
+      <window_info anchor="bottom" id="Run" order="2" />
+      <window_info anchor="bottom" id="Version Control" />
+      <window_info id="npm" side_tool="true" />
+      <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
+      <window_info active="true" anchor="bottom" id="Terminal" visible="true" />
+      <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
+      <window_info id="Favorites" side_tool="true" />
+      <window_info anchor="bottom" id="Find" order="1" />
+      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
+      <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" weight="0.25" />
+      <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
+      <window_info anchor="bottom" id="Message" order="0" />
+      <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
+    </layout>
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="1" />
+  </component>
+  <component name="VcsContentAnnotationSettings">
+    <option name="myLimit" value="2678400000" />
+  </component>
+  <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/test/test.js">
+      <provider selected="true" editor-type-id="text-editor" />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/lib/split.js">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="69">
+          <caret line="3" column="18" lean-forward="true" selection-start-line="3" selection-start-column="18" selection-end-line="3" selection-end-column="18" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/lib/quantifier.js">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="69">
+          <caret line="3" column="20" selection-start-line="3" selection-start-column="20" selection-end-line="3" selection-end-column="20" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/lib/meta.js">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="46">
+          <caret line="2" column="28" selection-start-line="2" selection-start-column="28" selection-end-line="2" selection-end-column="28" />
+        </state>
+      </provider>
+    </entry>
+  </component>
+</project>
\ No newline at end of file
diff --git a/lib/meta.js b/lib/meta.js
index a08ee57..5774eb0 100644
--- a/lib/meta.js
+++ b/lib/meta.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+    const patt=/.\.$/;
+    return patt.exec(str);
 }
\ No newline at end of file
diff --git a/lib/quantifier.js b/lib/quantifier.js
index a08ee57..5ed4a83 100644
--- a/lib/quantifier.js
+++ b/lib/quantifier.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+    const patt=/^\d+\.(jpg|jpeg)$/;
+    return patt.test(str);
 }
\ No newline at end of file
diff --git a/lib/split.js b/lib/split.js
index a08ee57..e6a5b0f 100644
--- a/lib/split.js
+++ b/lib/split.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
-  // TODO
+    // TODO
+    const patt = /\r*\n*\s*,\s*\n*\r*/;
+    return str.split(patt);
 }
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..a4b074f
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,196 @@
+{
+  "name": "exercise6",
+  "version": "0.0.1",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
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+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
+    },
+    "brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
+      "requires": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "browser-stdout": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
+      "dev": true
+    },
+    "commander": {
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+      "resolved": "http://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
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+      "dev": true,
+      "requires": {
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+        "inflight": "^1.0.4",
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+        "once": "^1.3.0",
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+    }
+  }
+}