#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>

using namespace std;


int main(){
	string s;
	cin >> s;

	vector<string> p = {"oda", "yukiko"};
	if(s == "yukiko") swap(p[0], p[1]);

	vector<string> b(8);
	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] == '.') continue;
			cnt++;
		}
	}
	
	cout << p[ cnt%2 ] << endl;
	
	return 0;
}