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