S = str(input())

a = len(S)

print('x' * a) S = str(input()) S str(input()) str input() input a = len(S) a len(S) len S print('x' * a) print 'x' * a 'x' a a = len(S) len(S) a S = str(input()) str(input()) S
S = str(input())

a = len(S)

print('x' * a)