diff --git a/12/index_test.html b/12/index_test.html
index 48acafb..fa73740 100644
--- a/12/index_test.html
+++ b/12/index_test.html
@@ -65,15 +65,15 @@
         <div id="table_content_06">
           <ul>
             <li id="track_6_1"> ℑ track ⊰ name ⊰ duration </li>
-            <li id="track_6_2"> ℑ track ⊰ name ⊰ duration </li>
+            <li id="track_6_2"> ⟫⟫ track ⊰ name ⊰ duration </li>
             <li id="track_6_3"> ℑ track ⊰ name ⊰ duration </li>
-            <li id="track_6_4"> ℑ track ⊰ name ⊰ duration </li>
+            <li id="track_6_4"> ⟫⟫ track ⊰ name ⊰ duration </li>
             <li id="track_6_5"> ℑ track ⊰ name ⊰ duration </li>
-            <li id="track_6_6"> ℑ track ⊰ name ⊰ duration </li>
+            <li id="track_6_6"> ⟫⟫ track ⊰ name ⊰ duration </li>
             <li id="track_6_7"> ℑ track ⊰ name ⊰ duration </li>
-            <li id="track_6_8"> ℑ track ⊰ name ⊰ duration </li>
+            <li id="track_6_8"> ⟫⟫ track ⊰ name ⊰ duration </li>
             <li id="track_6_9"> ℑ track ⊰ name ⊰ duration </li>
-            <li id="track_6_10"> ℑ track ⊰ name ⊰ duration </li>
+            <li id="track_6_10"> ⟫⟫ track ⊰ name ⊰ duration </li>
           </ul>
         </div>
       </div></div>