# -*- coding: utf-8 -*-
"""
No.88 次はどっちだ
https://yukicoder.me/problems/no/88

"""
import sys
from sys import stdin
input = stdin.readline


def main(args):
    S = input().strip()
    blank = 0
    for _ in range(8):
        blank += input().count('.')

    table = ['yukiko', 'oda']
    if S == 'oda':
        table = ['oda', 'yukiko']
    print(table[blank % 2])


if __name__ == '__main__':
    main(sys.argv[1:])