#include <bits/stdc++.h>
using namespace std;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);  
	
	string s; cin >> s;
	char pos;
	int cnt = 0;
	for(int i = 0; i < 8 ; i++){
		for(int j = 0; j  < 8; j++){
			cin >> pos;
			if(pos != '.') cnt++;
		}
	}
	if(cnt % 2 == 0) cout << s << endl;
	else {
		if(s == "oda") cout << "yukiko" << endl;
		else cout << "oda" << endl;
	}
	return 0;	
}