s=input()
n=len(s)

for i in range(n):
    print("x",end="")
print("") s=input() s input() input n=len(s) n len(s) len s for i in range(n):
    print("x",end="") i range(n) range n print("x",end="") print "x" end="" end "" print("") print "" s=input() input() s n=len(s) len(s) n
s=input()
n=len(s)

for i in range(n):
    print("x",end="")
print("")