public static String pangrams(String s) {
  boolean[] alphabet = new boolean[26];

  for (int i = 0; i < s.length(); i++) {
    if (s.charAt(i) >= 'a' && s.charAt(i) <= 'z') {
      System.out.println(s.charAt(i) - 'a');
      alphabet[(s.charAt(i) - 'a')] = true;
    } else if (s.charAt(i) >= 'A' && s.charAt(i) <= 'Z') {
      alphabet[s.charAt(i) - 'A'] = true;
    }
  }
  for (int i = 0; i < alphabet.length; i++) {
    if (!alphabet[i]) {
      return "not pangram";
    }
  }
  return "pangram";
}