#include <bits/stdc++.h>
using namespace std;
int main() {
  string a[] = {"vaporeon", "jolteon", "flareon", "espeon",
                "umbreon",  "leafeon", "glaceon", "sylveon"};
  int n, j, i, k;
  string b, c;
  cin >> n;
  cin >> c;
  for (int i = 0; i < 8; i++) {
    b = a[i];
    for (j = 0; b[j] && c[j]; j++) {
      if (c[j] == '.') continue;
      if (c[j] != b[j]) break;
    }
    if (b[j] == '\0' && c[j] == '\0') {
      cout << b << endl;
      return 0;
    }
  }
  return 0;
}
