#include <bits/stdc++.h>

using namespace std;

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