#include <iostream>
//using namespace std;
typedef unsigned long long ul;
typedef signed long long ll;

int main(void)
{
  std::cin.tie(0);
  std::ios::sync_with_stdio(false);
  std::cout << std::fixed;
  std::string s;
  std::cin >> s;
  int turn = 0;
  for (int i = 0; i < 8; ++i) {
    std::string b;
    std::cin >> b;
    for (auto c : b) if (c != '.') turn++;
  }
  if (s == "oda") std::cout << (turn%2==0 ? "oda" : "yukiko") << std::endl;
  else std::cout << (turn%2==1 ? "oda" : "yukiko") << std::endl;
  return 0;
}