#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <cmath>
#include <iomanip>
using namespace std;
typedef long long LL;

int main(){
    string sente;
    cin >> sente;
    int cnt = 0;
    for(int i = 0; i < 8; i++){
        string line;
        cin>> line;
        for(int j = 0; j < 8; j++){
            if(line[j] != '.') cnt++;
        }
    }
    if(cnt % 2 == 0){
        cout << sente << endl;
    }else{
        if(sente == "oda"){
            cout << "yukiko" << endl;
        }else{
            cout << "oda" << endl;
        }
    }
    return 0;
}