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