#include <bits/stdc++.h>
using namespace std;
int n, cnt;
char c[11];
int main() {
  scanf("%d %s", &n, c + 1);
  if (n == 6)
    printf("espeon\n");
  else if (n == 8)
    printf("vaporeon\n");
  else if (c[1] == 'j' || c[2] == 'o' || c[4] == 't')
    printf("jolteon\n");
  else if (c[1] == 'u' || c[2] == 'm' || c[3] == 'b')
    printf("umbreon\n");
  else if (c[1] == 'l' || c[2] == 'e' || c[4] == 'f')
    printf("leafeon\n");
  else if (c[1] == 's' || c[2] == 'y' || c[4] == 'v')
    printf("sylveon\n");
  else if (c[1] == 'f' || c[4] == 'r')
    printf("flareon\n");
  else
    printf("glaceon\n");
  return 0;
}
