n = len(input())
a = "x" * n
print(a) n = len(input()) n len(input()) len input() input a = "x" * n a "x" * n "x" n print(a) print a a = "x" * n "x" * n a n = len(input()) len(input()) n
n = len(input())
a = "x" * n
print(a)