S = input()

N = len(S)
s = 'x'*N
print(s) S = input() S input() input N = len(S) N len(S) len S s = 'x'*N s 'x'*N 'x' N print(s) print s N = len(S) len(S) N s = 'x'*N 'x'*N s S = input() input() S
S = input()

N = len(S)
s = 'x'*N
print(s)