import sys


def input(): return sys.stdin.readline().rstrip()


def main():
    S = input()
    B = [input() for i in range(8)]

    c = sum(b.count('.') for b in B)

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


if __name__ == '__main__':
    main()