def xor state key round for row in range len state for column in range

def xor(state, key, round):
	for row in range(len(state)):
		for column in range(len(state[row])):
			state[row][column] ^= key[row][column+round*4]

	return state


state = [
[]
[]
[]
[]
]

key = [
[]
[]
[]
[]
]

state = xor(state, key, round=1)

for row in state:
	p = ''
	for cell in row:
		p += hex(cell)[2:].zfill(2)
	print p