s = input()
n = len(s)

a = 'x'*n
print(a) s = input() s input() input n = len(s) n len(s) len s a = 'x'*n a 'x'*n 'x' n print(a) print a s = input() input() s n = len(s) len(s) n a = 'x'*n 'x'*n a
s = input()
n = len(s)

a = 'x'*n
print(a)
