#include <iostream>
#include <algorithm>
#include <string>

void solve() {
    std::string s;
    std::cin >> s;

    int t = 0;
    for (int i = 0; i < 8; ++i) {
        for (int j = 0; j < 8; ++j) {
            char c;
            std::cin >> c;
            if (c != '.') ++t;
        }
    }

    std::cout << ((t % 2 == 0) == (s == "oda") ? "oda" : "yukiko") << std::endl;
}

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

    solve();

    return 0;
}