#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, cnt = 0, idx, b = 0;
  char s[15], a[15][15] = {"vaporeon", "jolteon", "flareon", "espeon",
                           "umbreon",  "leafeon", "glaceon", "sylveon"};
  scanf("%d", &n);
  scanf("%s", s);
  for (int i = 0; i < n; i++)
    if (s[i] != '.') b++;
  for (int i = 0; i < 8; i++)
    if (strlen(a[i]) == n) {
      for (int j = 0; j < n; j++)
        if (a[i][j] == s[j] && s[j] != '.') cnt++;
      if (cnt == b) {
        idx = i;
        break;
      }
      cnt = 0;
    }
  printf("%s", a[idx]);
  return 0;
}
