#include <bits/stdc++.h>
using namespace std;
char name[10][10] = {"vaporeon", "jolteon", "flareon", "espeon",
                     "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  int n;
  scanf("%d", &n);
  char ans[10];
  scanf("%s", ans);
  int len = strlen(ans);
  for (int i = 0; i < 8; i++) {
    if (strlen(name[i]) != len)
      continue;
    else {
      int flag = 1;
      for (int j = 0; j < len; j++) {
        if (ans[j] != '.') {
          if (ans[j] != name[i][j]) {
            flag = 0;
            break;
          }
        }
      }
      if (flag == 1) printf("%s\n", name[i]);
    }
  }
  return 0;
}
