# -*- coding: utf-8 -*-

S = input()
B = []
for i in range(8):
    B.append(input())

stones_num = 0
for i in range(8):
    for j in range(8):
        c = B[i][j]
        if c!='.':
            stones_num += 1

if stones_num % 2 == 0:
    print(S)
else:
    print('oda') if S=='yukiko' else print('yukiko')