#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  char l;
  cin >> n;
  vector<string> pal(8);
  vector<bool> Bpal(8, true);
  pal[0] = "flareon";
  pal[1] = "vaporeon";
  pal[2] = "espeon";
  pal[3] = "umbreon";
  pal[4] = "leafeon";
  pal[5] = "glaceon";
  pal[6] = "sylveon";
  pal[7] = "jolteon";
  for (int i = 0; i < 8; i++) {
    if (n == pal[i].size()) {
      Bpal[i] = true;
    } else {
      Bpal[i] = false;
    }
  }
  for (int i = 0; i < n; i++) {
    cin >> l;
    if (l == '.') continue;
    for (int o = 0; o < 8; o++) {
      if (l != pal[o][i]) {
        Bpal[o] = false;
      }
    }
  }
  for (int i = 0; i < 8; i++) {
    if (Bpal[i] == true) {
      cout << pal[i] << endl;
    }
  }
  return 0;
}
