#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <map>
#include <functional>
#include <set>
#include <numeric>
#include <stack>
#include <utility>
//#include "util.h"

using namespace std;
typedef long long lint;
typedef pair<lint, lint> Pii;

int main()
{
	string S, B;
	int disc = 0;
	cin >> S;
	for (int i = 0; i < 8; i++) {
		cin >> B;
		for (int j = 0; j < 8; j++)
			disc += (B[j] == '.' ? 0 : 1);
	}
	if (disc % 2)
		cout << (S[0] == 'o' ? "yukiko" : "oda") << endl;
	else
		cout << S << endl;

	return 0;
}