#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <iomanip>
#include <functional>
#include <cmath>
using namespace std;
#define lli long long int

int main() {
	int n = 0;
	string str[2];
	char x;
	cin >> str[0];
	for (int i = 0; i < 8; i++) {
		for (int j = 0; j < 8; j++) {
			cin >> x;
			if (x != '.')	n++;
		}
	}
	if (str[0] == "oda")	str[1] = "yukiko";
	else					str[1] = "oda";
	cout << str[n % 2] << endl;
	return 0;
}