# -*- coding:utf-8 -*-
rival = {"oda": "yukiko", "yukiko": "oda"}
if __name__ == '__main__':
    s = input()
    bn =(input() for n in range(8))
    wbf = sum(b.count("w") + b.count("b") for b in bn) % 2 == 0
    print(s if wbf else rival[s])