diy3.py

import random
key = "hfxhvytdyr就覅就KFC看i发hvytd"
message = "诺依，周末一起去看动漫展吧！"
message = input("请输入：")
key_message=""
for i in range(len(message)):
    a=message[i]
    b=random.choice(key)
    c=random.choice(key)
    d=a+b+c
    key_message=key_message+d
message1=list(key_message)
message1.insert(random.randint(0,len(message1)),"$#@!$$%%##$%^%&U**")
message2="".join(message1)
print(message2)