#include <bits/stdc++.h>
using namespace std;
#define REP(i, n)           for(int(i)=0;(i)<(n);++(i))

int main(){

    string k;
    cin >> k;
    int c;
    string s;
    REP(i,8){
        cin >> s;
        REP(j,9){
            if(s[j] != '.') c++;
        }
    }

    if(c % 2 ^ k == "oda"){
        cout << "oda" << endl;
    } else {
        cout << "yukiko" << endl;
    }
    return 0;
}