#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;


int main() {

    string S;
    cin >> S;

    int cnt = 0;
    for (int i = 0; i < 8; i++) {
        string B;
        cin >> B;
        for (int j = 0; j < 8; ++j) {
            if (B[j] != '.') {
                cnt += 1;
            }
        }
    }

    if (cnt % 2 == 0) {
        cout << S << endl;
    } else {
        if(S == "oda") {
            cout << "yukiko" << endl;
        } else {
            cout << "oda" << endl;
        }
    }


}