S = str(input())
t = len(S)
print('x'*t) S = str(input()) S str(input()) str input() input t = len(S) t len(S) len S print('x'*t) print 'x'*t 'x' t t = len(S) len(S) t S = str(input()) str(input()) S
S = str(input())
t = len(S)
print('x'*t)