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



int main(){
	string player;
	cin >> player;
	int count = 0;
	string s;
	for (int i = 0; i < 8; i++)
	{
		cin >> s;
		for (int j = 0; j < 8; j++)
		{
			if (s[j] != '.') count++;
		}
	}
	if ((player == "oda") == (count % 2 == 0)) cout << "oda" << endl;
	else cout << "yukiko" << endl;
}