#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int,int> P;
 
const int INF = 1e9;
const int mod = 1e9+7;
const double EPS = 1e-10;
const double PI = acos(-1.0);

int main()
{
    string s,t;
    cin >> s;
    t = (s == "oda" ? "yukiko" : "oda");
    int cnt = -3;
    for(int i = 0; i < 8; i++){
        string str;
        cin >> str;
        for(int j = 0; j < 8; j++) if(str[j] != '.') cnt++;
    }

    cout << (cnt % 2 ? s : t)<< endl;

    return 0;
}