#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string str = "";
  cin >> str;
  int values[8] = {0, 0, 0, 0, 0, 0, 0, 0};
  int max = values[0];
  string evolution[8] = {"vaporeon", "espeon",  "flareon", "jolteon",
                         "umbreon",  "leafeon", "glaceon", "sylveon"};
  for (int i = 0; i < n - 3; i++) {
    if (n == 6) {
      cout << evolution[1];
      break;
    }
    if (n == 8) {
      cout << evolution[0];
      break;
    }
    if (str[i] != '.') {
      for (int j = 2; j < 8; j++) {
        if (str[i] == (evolution[j])[i]) {
          values[j] += 1;
        }
      }
    }
  }
  int pos = 0;
  for (int i = 2; i < 8; i++) {
    if (values[i] > max) {
      max = values[i];
      pos = i;
    }
  }
  if (pos > 1 && n == 7) {
    cout << evolution[pos];
  }
  return 0;
}
