#include <bits/stdc++.h>
using namespace std;
string env[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                 "umbreon",  "leafeon", "glaceon", "sylveon"};
char a[10];
bool mark[10] = {0};
int main() {
  int n;
  cin >> n >> a;
  if (n == 6) {
    cout << env[3] << endl;
    return 0;
  }
  if (n == 8) {
    cout << env[0] << endl;
    return 0;
  }
  int len = strlen(a);
  for (int i = 0; i < len; i++) {
    if (a[i] != '.') {
      for (int j = 0; j < 8; j++) {
        if (env[j][i] != a[i] || env[j].size() != len) mark[j] = 1;
      }
    }
  }
  for (int i = 0; i < 8; i++)
    if (!mark[i]) {
      cout << env[i] << endl;
      return 0;
    }
  return 0;
}
