s = input()

answer = 'x' * len(s)
print(answer) s = input() s input() input answer = 'x' * len(s) answer 'x' * len(s) 'x' len(s) len s print(answer) print answer s = input() input() s answer = 'x' * len(s) 'x' * len(s) answer
s = input()

answer = 'x' * len(s)
print(answer)