# !/usr/bin/env python
# -*- coding: utf-8 -*-


import string

s1 = "输入吧"
rot13_1 = string.ascii_lowercase[:13]
rot13_2 = string.ascii_lowercase[13:]
result = []
for i in s1:
    find_1 = rot13_1.find(i.lower())
    if find_1 != -1:
        if i.isupper():
            result.append(rot13_2[find_1].upper())
            continue
        result.append(rot13_2[find_1])
    find_2 = rot13_2.find(i.lower())
    if find_2 != -1:
        if i.isupper():
            result.append(rot13_1[find_2].upper())
            continue
        result.append(rot13_1[find_2])
    if find_1 == -1 and find_2 == -1:
        result.append(i)

print("".join(result))