#include <bits/stdc++.h>

using namespace std;

int main() {
  string first, second;
  cin >> first;
  if (first == "oda") second = "yukiko";
  else second = "oda";

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

  if (cnt % 2 == 0) cout << first << endl;
  else cout << second << endl;
  return 0;
}