#include<iostream>
#include<vector>
#include<string>

using namespace std;

vector<vector<char>> reversi(8,vector<char>(8));

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