#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <iostream>
#include <map>
#include <list>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>
#include <iomanip>

using namespace std;

int main(void)
{
	string name;
	string line;
	int cnt = 0;

	cin >> name;

	for (int i = 0; i < 8; i++) {
		cin >> line;
		for (int j = 0; j < line.length(); j++) {
			if(line[j] != '.') cnt++;
		}
	}

	if (cnt % 2 == 0) cout << name << endl;
	else {
		if (name == "oda") cout << "yukiko" << endl;
		else			   cout << "oda" << endl;
	}

	return (0);
}