a = str(input())
b = len(a)
print(b*"x") a = str(input()) a str(input()) str input() input b = len(a) b len(a) len a print(b*"x") print b*"x" b "x" a = str(input()) str(input()) a b = len(a) len(a) b
a = str(input())
b = len(a)
print(b*"x")