#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  if (n == 6) {
    cout << "espeon";
    return 0;
  }
  if (n == 8) {
    cout << "vaporeon";
    return 0;
  }
  vector<string> mass1, mass2;
  mass1.push_back("vaporeon");
  mass2.push_back("jolteon");
  mass2.push_back("flareon");
  mass2.push_back("umbreon");
  mass2.push_back("leafeon");
  mass2.push_back("glaceon");
  mass2.push_back("sylveon");
  int ans = -1;
  for (int i = 0; i < 6; i++) {
    int tek = 0;
    for (int j = 0; j < 7; j++) {
      if (s[j] != '.' && s[j] != mass2[i][j]) {
        tek = 1;
      }
    }
    if (tek == 0) {
      cout << mass2[i];
      return 0;
    }
  }
  return 0;
}
