#include <bits/stdc++.h>
char s[10];
int n;
int main() {
  scanf("%d%s", &n, s);
  if (n == 6) {
    puts("espeon");
    return 0;
  }
  if (n == 8) {
    puts("vaporeon");
    return 0;
  }
  if (s[0] == 'j' || s[1] == 'o' || s[3] == 't') {
    puts("jolteon");
    return 0;
  }
  if (s[0] == 's' || s[1] == 'y' || s[3] == 'v') {
    puts("sylveon");
    return 0;
  }
  if (s[0] == 'u' || s[1] == 'm' || s[2] == 'b') {
    puts("umbreon");
    return 0;
  }
  if (s[0] == 'l' || s[1] == 'e' || s[3] == 'f') {
    puts("leafeon");
    return 0;
  }
  if (s[0] == 'f' || s[3] == 'r') {
    puts("flareon");
    return 0;
  }
  if (s[0] == 'g' || s[3] == 'c') {
    puts("glaceon");
    return 0;
  }
}
