a = input()
b = 'x'*len(a)
print(b) a = input() a input() input b = 'x'*len(a) b 'x'*len(a) 'x' len(a) len a print(b) print b b = 'x'*len(a) 'x'*len(a) b a = input() input() a
a = input()
b = 'x'*len(a)
print(b)