"""
author: 20191312lxy

filename:experiment_1

time: 2020.4.12
"""
"""
这是个用来破解凯撒密码的小程序
"""
roman = input("请输入要破解的内容>>>")
letters = "abcdefghijklmnopqrstuvwxyz"
k = 1
while k <= 26:
    massage = ""
    for i in roman:
        a = letters.find(i)
        if (a - k) < 0:
            massage = massage + letters[a - k + 26]
        else:
            massage = massage + letters[a - k]
    print(f"对应{k} 原文为{massage}")
    k = k + 1