#include <bits/stdc++.h>

using namespace std;
string player[2] = {"oda", "yukiko"};
int main(){
    int cnt = 0;
    string first; cin >> first;
    
    for(int i = 0; i < 8; ++i){
        string s;
        cin >> s;
        for(int j = 0; j < 8; ++j){
            if(s[i] != '.') ++cnt;
        }
    }
    cout << player[first[1]&1 ^ cnt&1] << '\n';
    return 0;
}