private static DLL<Integer> vojska(DLL<Integer> lista, int a, int b, int c, int d) {
        DLL<Integer> tmp = lista;
        int i = 0;
        while(tmp.length() > 0) {
            if(tmp.getFirst().element == a) {
                a = i;
            }
            else if(tmp.getFirst().element == b) {
                b = i;
            }
            else if(tmp.getFirst().element == c) {
                c = i;
            }
            else if(tmp.getFirst().element == d) {
                d = i;
            }
            ++i;
            tmp.deleteFirst();
        }
        tmp = lista;
        DLL<Integer> left = null, right = null, middle = null;
        i = 0;
        while(tmp.length() > 0) {
            if(i >= a && i <= b) {
                left.insertLast(tmp.getFirst().element);
            }
            else if(i >= c && i <= d) {
                right.insertLast(tmp.getFirst().element);
            }
            else {
                middle.insertLast(tmp.getFirst().element);
            }
            i++;
        }
        tmp = lista;
        lista = null;
        i = 0;
        while(tmp.length() > 0) {
            if(i >= a && i <= b) {
                lista.insertLast(right.getFirst().element);
                right.deleteFirst();
            }
            else if(i >= c && i <= d) {
                lista.insertLast(left.getFirst().element);
                left.deleteFirst();
            }
            else {
                lista.insertLast(middle.getFirst().element);
                middle.deleteFirst();
            }
            tmp.deleteFirst();
            ++i;
        }


        return lista;
    }