#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main(){
    string s; cin >> s;
    vector<string> b(8);
    for(auto &it: b) cin >> it;

    int cnt = 0;
    for(int i = 0; i < 8; i++){
        for(int j = 0; j < 8; j++){
            if(b[i][j] != '.') cnt++;
        }
    }

    if((cnt%2 == 0) == (s == "oda")) cout << "oda" << endl;
    else cout << "yukiko" << endl;
    return 0;
}