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

int main() {
    string s;
    cin >> s;
    string t;
    if (s == "oda") t = "yukiko";
    else t = "oda";
    char c;
    int cnt = 0;
    for (int i = 0; i < 64; i++) {
        cin >> c;
        if (c == '.') cnt++;
    }
    if (c % 2 == 0) cout << s << endl;
    else cout << t << endl;
    return 0;
}