s = input()
if s == "oda":
    L = ["oda", "yukiko"]
elif s == "yukiko":
    L = ["yukiko", "oda"]

B = [list(input()) for _ in range(8)]
res = 0
for i in range(8):
    for j in range(8):
        if B[i][j] != '.':
            res += 1
print(L[res % 2])