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