public static boolean isAnagram(String a, String b) {
        if (a.length() != b.length()) return false;
        a = a.toLowerCase();
        b = b.toLowerCase();
        for (int i=0;i<a.length();i++){
            b= b.replaceFirst(String.valueOf(a.charAt(i)), "");
            
        }
        return (b.equals("")) ?  true :  false;
    }