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