#!/usr/bin/env python3
# -*- coding:utf-8 -*-
#Author：later_future
import string
miwen=input("请输入密文：")[出自:jiwo.org]
count=0
msg=""
flag=""
#培根加密百度百科解密原理是大小写都行的例如"A/a:aaaaa"这种
dicts={
    'aaaaa':'a','aaaab':'b','aaaba':'c','aaabb':'d','aabaa':'e',
    'aabab':'f','aabba':'g','aabbb':'h','abaaa':'i','abaab':'j',
    'ababa':'k','ababb':'l','abbaa':'m','abbab':'n','abbba':'o',
    'abbbb':'p','baaaa':'q','baaab':'r','baaba':'s','baabb':'t',
    'babaa':'u','babab':'v','babba':'w','babbb':'x','bbaaa':'y',
    'bbaab':'z',}
    
for i in miwen:
    msg+=i
    count+=1
    if count==5:
        c=dicts[msg]
        flag+=c
        count=0
        msg=""
        continue
#小写结果
print("flag:"+flag)
#大写结果
print("flag:"+flag.upper())