#include <bits/stdc++.h>

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

const int dx[] = {1, 0, -1, 0};
const int dy[] = {0, 1, 0, -1};
using namespace std;
typedef long long ll;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    string s;
    cin >> s;
    string t;
    int turn = 0;
    for (int i = 0; i < 8; i++) {
        cin >> t;
        for (int j = 0; j < 8; j++) if (t[j] != '.') turn++;
    }
    if (turn % 2 == 0) {
        cout << s << endl;
    } else {
        if (s == "oda") cout << "yukiko" << endl;
        else cout << "oda" << endl;
    }
    return 0;
}