static boolean isAnagram(String a, String b) {
        // Complete the function
        if(a.length()!=b.length()) return false;
        a = a.toLowerCase();
        b = b.toLowerCase();
        for(int i=0;i<a.length();i++){
            if(a.replaceAll(String.valueOf(a.charAt(i)),"").length() !=
                    b.replaceAll(String.valueOf(a.charAt(i)),"").length())return false;
        }
        return true;
    }