S = raw_input()
player = []
if S == 'oda': player = ['oda', 'yukiko']
else: player = ['yukiko', 'oda']
cnt = 0
for i in range(0, 8):
	B = raw_input()
	for j in range(0, 8):
		if B[j] != '.': cnt += 1
print player[cnt%2]