S = input()
s = ""
for i in range(0,len(S)):
    s += "x"
print(s) S = input() S input() input s = "" s "" for i in range(0,len(S)):
    s += "x" i range(0,len(S)) range 0 len(S) len S s += "x" s "x" print(s) print s S = input() input() S s = "" "" s s += "x" "x" s
S = input()
s = ""
for i in range(0,len(S)):
    s += "x"
print(s)