#include <bits/stdc++.h>
using namespace std;
char c[][15] = {"vaporeon", "jolteon", "flareon", "espeon",
                "umbreon",  "leafeon", "glaceon", "sylveon"};
char v[15];
int match(int i) {
  int n, j, m;
  n = strlen(v);
  m = strlen(c[i]);
  if (n != m) return 0;
  for (j = 0; j <= n; j++) {
    if (v[j] == '.') continue;
    if (v[j] != c[i][j]) return 0;
  }
  return 1;
}
int main() {
  int m, i, n;
  cin >> n >> v;
  for (i = 0; i <= 7; i++)
    if (match(i)) break;
  cout << c[i];
  return 0;
}
