class Result implements Comparator<String>{
    
    public int compare(String str1, String str2){
        return (str1.length()==str2.length()) ? str1.compareTo(str2) : str1.length()-str2.length();
    }

    public static List<String> bigSorting(List<String> unsorted) {
        Collections.sort(unsorted, new Result());
        return unsorted;
    }
}