#include <iostream>
#include <sstream>
#include <math.h>
#include <stack>
#include <set>
#include <algorithm>
#include <string>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <vector>
using namespace std;

#define INF (1 << 30)
#define INFLL (1LL << 60)

int main() {
	string sen,kou;
	cin >> sen;
	if(sen == "oda") kou = "yukiko";
	else kou = "oda";
	char isi;
	int count = 0;
	for(int i = 0;i < 8;i++){
		for(int j = 0;j < 8;j++){
			cin >> isi;
			if(isi != '.') count++;
		}
	}
	count -= 4;
	if(count % 2 == 0){
		cout << sen << endl;
	}else {
		cout << kou << endl;
	}
	return 0;
}