#coding: UTF-8

import sys
from math import pi
from collections import deque
from functools import reduce

### defs ###

### main ###
S  = sys.stdin.readline().strip('\r\n')
B = list(map(lambda s:s.strip('\r\n'), sys.stdin.readlines()))
B = reduce(lambda x,y:x+y, B)
cnt = (64 - B.count('.'))%2
s = {'oda':['oda','yukiko'], 'yukiko':['yukiko','oda']}
print(s[S][cnt])