#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)s; i < (int)e; i++)

int main() {
    cin.tie(nullptr);
    
    string S;
    cin >> S;
    
    int cnt = 0;
    
    rep(i, 0, 8) rep(j, 0, 8) {
        char B;
        cin >> B;
        
        if (B != '.') cnt++;
    }
    
    if (S == "oda") {
        if (cnt % 2 == 0) cout << "oda\n";
        else cout << "yukiko\n";
    } else {
        if (cnt % 2 == 0) cout << "yukiko\n";
        else cout << "oda\n";
    }
}