#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  string s;
  cin >> n >> s;
  if (n == 8) {
    cout << "vaporeon";
    return 0;
  }
  if (n == 6) {
    cout << "espeon";
    return 0;
  }
  bool isEqual = true;
  string a = "jolteon";
  for (int i = 0; i < 7; i++) {
    if (s[i] != '.' && s[i] != a[i]) {
      isEqual = false;
      break;
    }
  }
  if (isEqual) {
    cout << "jolteon";
    return 0;
  }
  isEqual = true;
  a = "flareon";
  for (int i = 0; i < 7; i++) {
    if (s[i] != '.' && s[i] != a[i]) {
      isEqual = false;
      break;
    }
  }
  if (isEqual) {
    cout << "flareon";
    return 0;
  }
  isEqual = true;
  a = "umbreon";
  for (int i = 0; i < 7; i++) {
    if (s[i] != '.' && s[i] != a[i]) {
      isEqual = false;
      break;
    }
  }
  if (isEqual) {
    cout << "umbreon";
    return 0;
  }
  isEqual = true;
  a = "leafeon";
  for (int i = 0; i < 7; i++) {
    if (s[i] != '.' && s[i] != a[i]) {
      isEqual = false;
      break;
    }
  }
  if (isEqual) {
    cout << "leafeon";
    return 0;
  }
  isEqual = true;
  a = "glaceon";
  for (int i = 0; i < 7; i++) {
    if (s[i] != '.' && s[i] != a[i]) {
      isEqual = false;
      break;
    }
  }
  if (isEqual) {
    cout << "glaceon";
    return 0;
  }
  isEqual = true;
  a = "sylveon";
  for (int i = 0; i < 7; i++) {
    if (s[i] != '.' && s[i] != a[i]) {
      isEqual = false;
      break;
    }
  }
  if (isEqual) {
    cout << "sylveon";
    return 0;
  }
  return 0;
}
