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