#include <bits/stdc++.h>
using namespace std;

int main(){
	string player1,player2;
	cin >> player1;
	int count = 0;
	for(int i = 0; i < 8; i++){
		string masu;
		cin >> masu;
		for(int j = 0; j < 8; j++){
			if(masu[j] != '.') count++;
		}
	}
	if(player1 == "oda") player2 = "yukiko";
	else player2 = "oda";
	cout << (count%2 == 0 ? player1 : player2) << endl;
	return 0;
}