diff --git a/index.html b/index.html
index b93f87a..aa2ea49 100644
--- a/index.html
+++ b/index.html
@@ -243,6 +243,34 @@
         </div>
       </div>
     </div>
+
+    <span style="display: none;">
+      <img src="I-0.png"/>
+      <img src="I-1.png"/>
+      <img src="I-2.png"/>
+      <img src="I-3.png"/>
+      <img src="J-0.png"/>
+      <img src="J-1.png"/>
+      <img src="J-2.png"/>
+      <img src="J-3.png"/>
+      <img src="L-0.png"/>
+      <img src="L-1.png"/>
+      <img src="L-2.png"/>
+      <img src="L-3.png"/>
+      <img src="O-0.png"/>
+      <img src="S-0.png"/>
+      <img src="S-1.png"/>
+      <img src="S-2.png"/>
+      <img src="S-3.png"/>
+      <img src="T-0.png"/>
+      <img src="T-1.png"/>
+      <img src="T-2.png"/>
+      <img src="T-3.png"/>
+      <img src="Z-0.png"/>
+      <img src="Z-1.png"/>
+      <img src="Z-2.png"/>
+      <img src="Z-3.png"/>
+    </span>
     
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ENjdO4Dr2bkBIFxQpeoTz1HIcje39Wm4jDKdf19U8gI4ddQ3GYNS7NTKfAdVQSZe" crossorigin="anonymous"></script>
     <script src="app.js"></script>