import sys

player1 = input()

if player1 == "oda":
    player2 = "yukiko"
else:
    player2 = "oda"

cnt = 0

for j in range(8):
    line = input()
    for c in line:
        if c != '.':
            cnt = cnt + 1

if cnt % 2:
    print(player2)
else:
    print(player1)