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

template<typename T>
istream &operator>>(istream &is,vector<T> &a){
    for(auto &v : a) cin >> v;
    return is;
}
template<typename T>
ostream &operator<<(ostream &os,const vector<T> &a){
    if(a.size() == 0) return os;
    cout << a.at(0);
    for(int i=1; i<a.size(); i++) cout << " " << a.at(i);
    cout << "\n";
    return os;
}

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

    string s; cin >> s;
    string t;
    int v = 0;
    for(int i=0; i<8; i++){
        cin >> t;
        for(auto c : t) v += c!='.';
    }
    if(s == "yukiko"){
        if(v%2) cout << "oda\n";
        else cout << "yukiko\n";
    }
    else{
        if(v%2 == 0) cout << "oda\n";
        else cout << "yukiko\n";
    }
}