#include <algorithm>
#include <array>
#include <cstdio>
#include <iostream>
#include <numeric>
#include <optional>
#include <vector>

using namespace std;

int main() {
    string s;
    cin >> s;
    string p0 = s, p1 = s == "oda" ? "yukiko" : "oda";
    int32_t cnt = 0;
    for (auto i = 0; i < 8; ++i) {
        string b;
        cin >> b;
        for (auto c : b) {
            if (c != '.')
                ++cnt;
        }
    }
    cout << ((cnt % 2 == 0) ? p0 : p1) << endl;
    return 0;
}