#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  string s;
  cin >> s;
  string t = s == "oda" ? "yukiko" : "oda";

  int cnt = 0;
  REP (i, 8) {
    string line;
    cin >> line;
    REP (j, 8)
      cnt += line[j] != '.';
  }

  if (cnt % 2 == 0)
    cout << s << endl;
  else
    cout << t << endl;
  
  return 0;
}