# -*- coding:utf-8 -*-

import re



s = eval(input())



print((re.sub(r'[a-z]', 'x', s)))
s = eval(input())

print(('x'*len(s)))
# -*- coding:utf-8 -*-
import re

s = eval(input())
print((re.sub(r"[a-z]", "x", s)))

s = eval(input())
print(("x" * len(s)))

-# -*- coding:utf-8 -*- -import re - -print((re.sub(r"[a-z]", "x", s))) +print(("x" * len(s)))