diff --git a/diy4.py b/diy4.py
index 41a43ff..88762b8 100644
--- a/diy4.py
+++ b/diy4.py
@@ -13,6 +13,8 @@ for i in message:
     text=str1+str2+str3
     key_mess = text
     doukeyi= list(key_mess)
-    doukeyi.insert(1,gr)
+    suoyin=random.randint(0,len(key_mess))
+
+    doukeyi.insert(suoyin,gr)
     zifuchuan = "".join(doukeyi)
     print(zifuchuan)
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