#include <iostream>
#include <string>

using namespace std;

int main() {
    string s, b;
    cin >>s;
    int count = 0;
    for (int i = 0; i < 8; ++i) {
        cin >> b;
        for (auto itr = b.begin(); itr != b.end(); ++itr) {
            if ( *itr != '.') count++;
        }
    }
    if (s == "oda") {
        if (count % 2 == 0) cout << "oda" << endl;
        else cout << "yukiko" << endl;
    } else {
        if (count % 2 == 0) cout << "yukiko" << endl;
        else cout << "oda" << endl;
    }
    return 0;
}