#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int cnt = 0;
    string s, t;
    cin >> s;
    if (s == "oda") t = "yukiko";
    else t = "oda";
    for (int i = 0; i < 8; i++){
        string temp;
        cin >> temp;
        for (int j = 0; j < 8; j++){
            if (temp[j] != '.') cnt++;
        }
    }
    cout << ((cnt%2) ? t : s) << endl;
}