#include <bits/stdc++.h>
using namespace std;

int main() {
    string S, B[10];
    cin >> S;
    for (int i = 0; i < 8; i++) {
        cin >> B[i];
    }

    if (S[0] == 'o')
        S[0] = 0;
    else
        S[0] = 1;

    int cnt = 0;
    for (int i = 0; i < 8; i++) {
        for (int j = 0; j < 8; j++) {
            cnt += !(B[i][j] == '.');
        }
    }
    cout << ((cnt + S[0]) % 2 ? "yukiko" : "oda") << endl;
}