#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {

	string S,s1,s2, B[8];
	cin >> S;

	if (S == "oda") {
		s1 = "oda";
		s2 = "yukiko";
	}
	else {
		s1 = "yukiko";
		s2 = "oda";
	}

	for (int i = 0; i < 8; i++) cin >> B[i];

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

	if (cnt % 2 == 0) cout << s1 << endl;
	else cout << s2;

	return 0;
}