s = str(input())

t = 'x'* len(s)
print(t) s = str(input()) s str(input()) str input() input t = 'x'* len(s) t 'x'* len(s) 'x' len(s) len s print(t) print t s = str(input()) str(input()) s t = 'x'* len(s) 'x'* len(s) t
s = str(input())

t = 'x'* len(s)
print(t)