#include <vector>
#include <string>
#include <algorithm>
#include <numeric>
#include <iostream>
#include <fstream>
#include <queue>
#include <cstring>
using namespace std;

using ll = long long;
using ull = unsigned long long;

using P = pair<ll,ll>;

int main()
{
  string name;
  cin >> name;
  string name2 = (name == "oda") ? "yukiko" : "oda";

  int count = 0;

  for(int i = 0; i < 64; ++i)
  {
    char data;
    cin >> data;
    if(data != '.')
      ++count;
  }

  if(count & 1)
    cout << name2 << endl;
  else
    cout << name << endl;
}