#include <bits/stdc++.h>

using namespace std;

#define REP(i, n) for(int i = 0; i < n; i++)

int main() {
    string s, sente = "oda", gote = "yukiko";
    cin >> s;
    if (s == "yukiko") {
        sente = "yukiko", gote = "oda";
    }

    int cnt = 0;
    REP(i, 8 * 8) {
        char c;
        cin >> c;
        if (c != '.') cnt++;
    }

    cout << ((cnt % 2 == 0) ? sente : gote) << endl;
    return 0;
}