//java 17 solution

 public static String pangrams(String s) {
 // Write your code here
 List<Character> chars = s.toLowerCase().chars().mapToObj(c -> (char)c)
    .distinct()
    .filter(c -> c != ' ')
    .collect(Collectors.toList());

 if(chars.size() == 26) {
    return "pangram";
 }
 return "not pangram";
}