import re

N = input()
N = re.sub(r'[A-z]', 'x', N)

print(N) import re re N = input() N input() input N = re.sub(r'[A-z]', 'x', N) N re.sub(r'[A-z]', 'x', N) re.sub re sub r'[A-z]' 'x' N print(N) print N N = re.sub(r'[A-z]', 'x', N) re.sub(r'[A-z]', 'x', N) N N = input() input() N
import re

N = input()
N = re.sub(r'[A-z]', 'x', N)

print(N)