static boolean isCharConsidered(char[] chs, char ch) {
      for(int i = 0; i < chs.length; i++) {
        if(chs[i] == ch)
          return true;
      }
      return false;
    }
    
    static int getCntOfChar(byte[] chs, char ch) {
      int res = 0;
      for(int i = 0; i < chs.length; i++) {
        if(chs[i] == ch)
          res++;
      }
      return res;
    }
    
    static boolean isAnagram(String a, String b) {

      if(a.length() != b.length())
        return false;
      
      // Complete the function
      byte[] acs = a.toLowerCase().getBytes();
      byte[] bcs = b.toLowerCase().getBytes();

      int nextChar = 0;
      char[] chars = new char[a.length()];

      for(int i = 0; i < a.length(); i++) {
        if(!isCharConsidered(chars, a.charAt(i))){
          chars[nextChar++] = a.charAt(i);
          if (getCntOfChar(acs, a.charAt(i)) != getCntOfChar(bcs, a.charAt(i)))
            return false;
        }
      }

      return true;
    }