# No.88 次はどっちだ
s = input()
b = [input() for i in range(8)]
players = []
num_space = 0

if s == 'oda':
    players = [s, 'yukiko']
else:
    players = [s, 'oda']

for i in range(8):
    num_space += b[i].count('.')

print(players[num_space % 2])