S = input()
player = [""]*2
if S[0] == 'o':
    player[0] = "oda"
    player[1] = "yukiko"
else:
    player[1] = "oda"
    player[0] = "yukiko"

B = ""

for i in range(8):
    B += input()

count = 0
for i in range(64):
    if B[i] != '.':
        count += 1

print(player[count%2])