#include <bits/stdc++.h>
using namespace std;
string name[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                  "umbreon",  "leafeon", "glaceon", "sylveon"};
string temp[] = {"jolt", "flar", "umbr", "leaf", "glac", "sylv"};
int a[] = {1, 2, 4, 5, 6, 7};
int main() {
  int n;
  while (cin >> n) {
    char letter[9];
    int index = 0;
    for (int i = 0; i < n; i++) {
      cin >> letter[i];
    }
    if (n == 8) {
      index = 0;
    } else if (n == 6) {
      index = 3;
    } else {
      int max = 0;
      for (int i = 0; i < 6; i++) {
        int coun = 0;
        for (int j = 0; j < 4; j++) {
          char l = temp[i][j];
          if (letter[j] == temp[i][j]) {
            coun++;
          }
        }
        if (max < coun) {
          index = a[i];
          max = coun;
        }
      }
    }
    cout << name[index] << endl;
  }
  return 0;
}
