Pangram

A pangram is a sentence where every letter of the English alphabet appears at least once.

Given a string sentence containing English letters (lower or upper-case), return true if sentence is a pangram, or false otherwise.

Note: The given sentence might contain other characters like digits or spaces, your solution should handle these too.

Example 1:

• Input: sentence = "thequickbrownfoxjumpsoverthelazydog"
• Output: true

Example 2:

• Input: sentence = "leetcode"
• Output: false

class Solution {
  public boolean checkIfPangram(String sentence) {
    var set = new HashSet<Integer>();
    for (var i = 0; i < sentence.length(); i ++) {
      int ascii = sentence.charAt(i);
      if (ascii >=65 && ascii <= 90) {
        ascii += 32;
      }
      if (ascii >=97 && ascii <= 122) {
        set.add(ascii);
      }
    }
    System.out.println(set.size());
    return set.size() == 26;
  }
}