Check Pangram in Java

1import java.util.HashSet;
2import java.util.Scanner;
3import java.util.Set;
4
5public class Main {
6    public static void main(String[] args) {
7        Scanner sc = new Scanner(System.in);
8        System.out.print("Enter a sentence: ");
9        String s = sc.nextLine().toLowerCase();
10
11        Set<Character> set = new HashSet<>();
12        for (char c : s.toCharArray()) {
13            if (c >= 'a' && c <= 'z') {
14                set.add(c);
15            }
16        }
17
18        if (set.size() == 26) {
19            System.out.println("Pangram");
20        } else {
21            System.out.println("Not Pangram");
22        }
23        sc.close();
24    }
25}