#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <math.h>
using namespace std;

int main() {
    string s,s2 = "oda";
    cin >> s;
    if(s == "oda")s2 = "yukiko";
    
    int c = 0;
    for(int i = 0;i < 8;i++){
        string b;
        cin >> b;
        for(int j = 0;j < 8;j++){
            if(b[j] == '.')c++;
        }
    }
    if(c % 2 == 0)cout << s << endl;
    else cout << s2 << endl;
    return 0;
}