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 T = "x" * len(S) "x" * len(S) T S = str(input()) str(input()) S
S = str(input())
T = "x" * len(S)
print(T)