from sys import stdin
from itertools import product

def main():
    S = input()
    B = stdin.read().splitlines()

    if S == 'oda':
        players = ['oda', 'yukiko']
    else:
        players = ['yukiko', 'oda']
    cnt = 64 - ''.join(B).count('.')
    if cnt % 2:
        for i, j in product(range(5), repeat=2):
            if all((B[i][j] == '.', B[i][j+1] == 'b', B[i][j+2] == 'w')) or \
                    all((B[i][j] == '.', B[i+1][j] == 'b', B[i+2][j] == 'w')):
                print(players[1])
                break
        else:
            print(players[0])
    else:
        for i, j in product(range(5), repeat=2):
            if all((B[i][j] == '.', B[i][j+1] == 'w', B[i][j+2] == 'b')) or \
                    all((B[i][j] == '.', B[i+1][j] == 'w', B[i+2][j] == 'b')):
                print(players[0])
                break
        else:
            print(players[1])

main()