S = input()
T = ''
for _ in range(len(S)):
  T += 'x'
print(T) S = input() S input() input T = '' T '' for _ in range(len(S)):
  T += 'x' _ range(len(S)) range len(S) len S T += 'x' T 'x' print(T) print T S = input() input() S T += 'x' 'x' T T = '' '' T
S = input()
T = ''
for _ in range(len(S)):
  T += 'x'
print(T)