import random

key = "abcdefgh使用编程实现位移替换加密，制作密码机关真是太好玩了哈哈！"
message = "诺依，周末一起去看动漫展吧！"
key_message="sbsbsb"
noise="port.';flfk;lku"
for i in message:
    str1=i
    str2=random.choice(key)
    str3=random.choice(key)
    text=str1+str2+str3
    key_message=key_message+text
list_message=list(key_message)
index=random.randint(0,len(key_message))
list_message.insert(index,noise)
result_message= "".join(list_message)
print(result_message)