S = input()
bb = 'x'*len(S)
print(bb) S = input() S input() input bb = 'x'*len(S) bb 'x'*len(S) 'x' len(S) len S print(bb) print bb bb = 'x'*len(S) 'x'*len(S) bb S = input() input() S
S = input()
bb = 'x'*len(S)
print(bb)
