#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);

    string s; cin >> s;
    vector<string> a(2);
    a[0] = "oda"; a[1] = "yukiko";
    int c = 0;
    rep(i,8)rep(j,8){
        char b; cin >> b;
        if(b != '.') c++;
    }

    c = (c + (s == "oda"))&1;
    cout << a[!c] << endl;
}