#include <bits/stdc++.h>
using namespace std;
const int oo = int(2e9) + 9;
const double eps = 1e-9;
const double pi = 3.14159265358979323846264338327950;
int main() {
  int n;
  scanf("%d", &n);
  char str[15];
  scanf("%s", str);
  char names[][15] = {"vaporeon", "jolteon", "flareon", "espeon",
                      "umbreon",  "leafeon", "glaceon", "sylveon"};
  for (int i = 0; i < 8; i++) {
    bool f = true;
    for (int j = 0; j < strlen(str); j++)
      if (str[j] != names[i][j] && str[j] != '.') {
        f = false;
        break;
      }
    if (f && strlen(names[i]) == strlen(str)) {
      printf("%s\n", names[i]);
      return 0;
    }
  }
  return 0;
}
