#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>

#define REP(i, a, b) for (int i = int(a); i < int(b); i++)
#define dump(s) cerr << __LINE__ << "\t:" << #s << " = " << (s) << endl
    
using namespace std;

int main () {
    string s;
    cin >> s;
    string opp = (s == "oda" ? "yukiko" : "oda");
    string sl[2] = {s, opp};
    int cnt = 0;
    REP (i, 0, 8) {
	string B;
	cin >> B;
	for (auto &b : B) {
	    if (b != '.') cnt++;
	}
    }
    cout << sl[cnt % 2] << endl;
    return 0; 
}