#include <bits/stdc++.h>

using namespace std;

int main(void) {
  string fir, sec;
  cin >> fir;
  sec = (fir == "oda" ? "yukiko" : "oda");

  int cnt = 0;
  for (int i = 0; i < 8; i++) {
    string s;
    cin >> s;
    for (int j = 0; j < s.size(); j++) {
      cnt += (s[j] != '.');
    }
  }

  cout << (cnt & 1 ? sec : fir) << endl;

  return 0;
}