#include <bits/stdc++.h>
using namespace std;
string e[8] = {"vaporeon", "jolteon", "flareon", "espeon",
               "umbreon",  "leafeon", "glaceon", "sylveon"};
string x;
int main() {
  int n;
  cin >> n;
  cin >> x;
  for (int i = 0; i < 8; i++) {
    if (x.size() != e[i].size()) continue;
    for (int j = 0; j < x.size(); j++) {
      if (x[j] != '.' && x[j] != e[i][j]) break;
      if (j == x.size() - 1) {
        cout << e[i];
        return 0;
      }
    }
  }
  return 0;
}
