#include <bits/stdc++.h>
using namespace std;
int a, b, c, d, e, f, g, m, n, z, x, k, l, o, s, ans, maxa, sum;
char st[100][101] = {"vaporeon", "jolteon", "flareon", "espeon",
                     "umbreon",  "leafeon", "glaceon", "sylveon"},
     str[10001];
int main() {
  cin >> n;
  getchar();
  gets(str);
  for (a = 0; a <= 7; a++) {
    l = strlen(st[a]);
    x = 0;
    for (b = 0; b <= l - 1; b++)
      if (st[a][b] != str[b] && str[b] != '.') {
        b = l;
        x = 1;
      }
    if (x == 0) {
      cout << st[a];
      return 0;
    }
  }
}
