#include <bits/stdc++.h>
using namespace std;
int main() {
  string str;
  int tp, max = 0, count = 0, idx;
  string arr[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                   "umbreon",  "leafeon", "glaceon", "sylveon"};
  cin >> tp >> str;
  if (tp == 6)
    idx = 3;
  else if (tp == 8)
    idx = 0;
  else {
    for (int i = 0; i < 8; i++) {
      count = 0;
      for (int j = 0; j < 6; j++) {
        if (str.at(j) == arr[i].at(j)) count++;
      }
      if (count > max) {
        max = count;
        idx = i;
      }
    }
  }
  cout << arr[idx];
  return 0;
}
