s = input()
l = ['oda','yukiko']
def count_stone(c):
    i = 0
    for v in c:
        if v != '.':
            i += 1
    return i

j = 0
for v in range(1,9):
    c = input()
    j += count_stone(c)

if j % 2 == 0:
    print(s)
else:
    l.remove(s)
    print(l[0])