Домашняя работа

Scanner in = new Scanner(System.in);
        // 1
        System.out.println("Enter word:");
        String qwe = in.next();
        int l = qwe.length();
        ArrayList<String> asd = new ArrayList<String>();
            while (asd.size() != (int) (Math.pow(l,l))){
                String z = "";
                for (int j = 0; j < l; j++) {
                    z += qwe.charAt(0 + (int) (Math.random() * l)); }
                if( asd.contains(z)) continue;
                else asd.add(z); }
        for (String x: asd) { System.out.println(x); }

//2
        String y = in.nextLine();
        String[] e = y.split(" ");
        for (int i = e.length-1; i >= 0; i--) {
            System.out.print(e[i] + " "); }


        // 3
        HashSet<Character> v = new HashSet<Character>();
        String r = in.nextLine();
        char[] a = r.toCharArray();
        for (char i : a) {
            v.add(i); }
        for (char i: v) {
            System.out.print(i); }


        //4
        int[] sd = {1,2,3,4,43,34,5,134,43,62,3,3};
        Arrays.sort(sd);
        for (int i: sd) {
            System.out.println(i); }


//5
        Map map = new HashMap();
        map.put(1, "один");
        map.put(2, "два");
        map.put(3, "три");
        int sum = 0;
        for( Object i : map.keySet()){
            sum += Integer.parseInt(i.toString()); }