#include <bits/stdc++.h>
using namespace std;
int main() {
  int x, i, j, count = 0, empty;
  string a[8], b;
  a[0] = "vaporeon";
  a[1] = "jolteon";
  a[2] = "flareon";
  a[3] = "espeon";
  a[4] = "umbreon";
  a[5] = "leafeon";
  a[6] = "glaceon";
  a[7] = "sylveon";
  cin >> x;
  cin >> b;
  for (i = 0; i < 8; i++) {
    count = 0, empty = 0;
    for (j = 0; j < x; j++) {
      if (b[j] != '.') {
        empty = 1;
        if (a[i][j] != b[j]) count = 1;
      }
    }
    if (count == 0 && a[i].length() == x) break;
  }
  if (empty == 1)
    cout << a[i];
  else if (x == 6)
    cout << "espeon";
  else if (x == 8)
    cout << "vaporeon";
  return 0;
}
