S = input()
 
S_len = len(S)
 
print("x" * S_len) S = input() S input() input S_len = len(S) S_len len(S) len S print("x" * S_len) print "x" * S_len "x" S_len S = input() input() S S_len = len(S) len(S) S_len
S = input()
 
S_len = len(S)
 
print("x" * S_len)