// {{{ Templates
#include <bits/stdc++.h>

#define show(x) cerr << #x << " = " << x << endl

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v)
{
    os << "sz:" << v.size() << "\n[";
    for (const auto& p : v) {
        os << p << ",";
    }
    os << "]\n";
    return os;
}

template <typename S, typename T>
ostream& operator<<(ostream& os, const pair<S, T>& p)
{
    os << "(" << p.first << "," << p.second
       << ")";
    return os;
}


constexpr ll MOD = (ll)1e9 + 7LL;

template <typename T>
constexpr T INF = numeric_limits<T>::max() / 100;

// }}}

int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    bool oda = true;
    string s;
    cin >> s;
    if (s == "oda") {
        oda = true;
    } else {
        oda = false;
    }

    int stone = 0;
    for (int i = 0; i < 8; i++) {
        string st;
        cin >> st;
        for (int j = 0; j < 8; j++) {
            if (st[j] != '.') {
                stone++;
            }
        }
    }
    if (stone % 2 == 0) {
        cout << ((oda) ? "oda" : "yukiko") << endl;
    } else {
        cout << ((oda) ? "yukiko" : "oda") << endl;
    }


    return 0;
}