#include <iostream>
#include <string>
using namespace std;

int main() {
  string s1;
  cin >> s1;
  string s2 = s1 == "oda" ? "yukiko" : "oda";
  int cnt = 0;
  for (int i = 0; i < 64; ++i) {
      char tmp;
      cin >> tmp;
      if (tmp != '.') cnt++;
  }
  cout << (cnt % 2 == 0 ? s1 : s2) << endl;
  return 0;
}