#include <bits/stdc++.h>

using namespace std;

int main()
{
    string s; cin >> s;

    int cnt = s == "oda";

    for (int i = 0; i < 8; ++i) {
        cin >> s;
        for (int j = 0; j < 8; ++j) {
            if (s[j] != '.') cnt++;
        }
    }

    cout << ((cnt & 1) ? "oda" : "yukiko") << endl;
}