#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, y1 = 0, y2 = 0, y3 = 0, y4 = 0, y5 = 0, y6 = 0, y7 = 0, i, z;
  char a[10];
  char x1[] = "jolteon";
  char x2[] = "flareon";
  char x3[] = "leafeon";
  char x4[] = "glaceon";
  char x5[] = "sylveon";
  char x6[] = "espeon";
  char x7[] = "umbreon";
  scanf("%d", &n);
  scanf("%s", a);
  if (n == 8) {
    printf("vaporeon");
    return 0;
  } else if (n == 6) {
    printf("espeon");
    return 0;
  } else if (n == 7) {
    for (i = 0; i < 7; i++) {
      if (a[i] != '.') {
        if (a[i] == x1[i]) y1 += 1;
        if (a[i] == x2[i]) y2 += 1;
        if (a[i] == x3[i]) y3 += 1;
        if (a[i] == x4[i]) y4 += 1;
        if (a[i] == x5[i]) y5 += 1;
        if (a[i] == x7[i]) y7 += 1;
      }
    }
    int z = max(y1, max(y2, max(y3, max(y4, max(y5, y7)))));
    if (y1 == z)
      printf("jolteon");
    else if (y2 == z)
      printf("flareon");
    else if (y3 == z)
      printf("leafeon");
    else if (y4 == z)
      printf("glaceon");
    else if (y5 == z)
      printf("sylveon");
    else
      printf("umbreon");
  }
}
