S = input()
r = "x" * len(S)
print(r) S = input() S input() input r = "x" * len(S) r "x" * len(S) "x" len(S) len S print(r) print r S = input() input() S r = "x" * len(S) "x" * len(S) r
S = input()
r = "x" * len(S)
print(r)
