s = input()
n = len(s)
t = ("x")*n
print(t) s = input() s input() input n = len(s) n len(s) len s t = ("x")*n t ("x")*n "x" n print(t) print t t = ("x")*n ("x")*n t n = len(s) len(s) n s = input() input() s
s = input()
n = len(s)
t = ("x")*n
print(t)