diff --git a/diy.py b/diy.py
index 98a1209..663988e 100644
--- a/diy.py
+++ b/diy.py
@@ -9,7 +9,9 @@ fori in message :
     str3=random.choice(key)
     text=str1+str2+str3
     key_message=key_message+text
+
 list_message=list(key_message)
-list_message.insert(5,noise)
+index=random.randint(0,len(key_message))
+list_message.insert(index,noise)
 result_message="".join(list_message)
 print(result_message)