# 154 B

s = input()

for i in s:
    print('x', end = "") s = input() s input() input for i in s:
    print('x', end = "") i s print('x', end = "") print 'x' end = "" end "" s = input() input() s
# 154 B

s = input()

for i in s:
    print('x', end = "")