#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>

using namespace std;

const int LENGTH = 8;

int main() {
	string s, b;
	int stone = 0;

	cin >> s;
	for (int i = 0; i < LENGTH; i++) {
		cin >> b;
		for (int j = 0; j < LENGTH; j++) {
			if (b[j] != '.') {
				stone++;
			}
		}
	}

	stone %= 2;

	if ((s == "oda" && stone == 0) || (s == "yukiko" && stone == 1)) {
		cout << "oda" << endl;
	} else {
		cout << "yukiko" << endl;
	}
	return 0;
}