void printDisciplines()
    {
        ofstream out("ListOfDisciplines.txt");
        out << " ";
        for (int i = 0; i < 47; ++i)
            out << '_';
        out << endl << "/                                               \\" << endl;
        out << "|            SORTED LIST OF DISCIPLINES         |" << endl;
        out << "\\";
        for (int i = 0; i < 47; ++i)
            out << '_';
        out << "/" << endl;
        out << "/                              |                \\" << endl;
        out << "|          Discipline          |Number of Copies|" << endl;
        out << "|______________________________|________________|" << endl;

        unsigned long long counter;
        String curMin;
        String last = "0";
        bool found = false;

        while (curMin != last)
        {
            if (curMin[0] != '\0')
                last = curMin;
            curMin = "я";
            counter = 0;
            found = false;

            for (Node* ptr = this->front; ptr != back; ptr = ptr->next)
            {
                unsigned char firstChar = static_cast<unsigned char>(ptr->data->getDiscipline()[0]);
                if (firstChar < static_cast<unsigned char>(curMin[0]) && (last[0] == '\0' || static_cast<unsigned char>(last[0]) < firstChar))
                {
                    curMin = ptr->data->getDiscipline();
                    found = true;
                }
                else if (firstChar == static_cast<unsigned char>(curMin[0]) && (last[0] == '\0' || static_cast<unsigned char>(last[0]) == firstChar))
                    for (unsigned int j = 0; true; ++j)
                        if (static_cast<unsigned char>(ptr->data->getDiscipline()[j]) > static_cast<unsigned int>(curMin[j]))
                            break;
                        else if (static_cast<unsigned char>(ptr->data->getDiscipline()[j]) < static_cast<unsigned char>(curMin[j]))
                        {
                            curMin = ptr->data->getDiscipline();
                            found = true;
                            break;
                        }
            }

            for (Node* ptr = this->front; ptr != back; ptr = ptr->next)
                if (ptr->data->getDiscipline() == curMin)
                    counter += ptr->data->getNumberOfCopies();
            if (found)
            {
                out << '|';
                out.setf(ios::left);
                out.width(30);
                out << curMin << '|';
                out.width(16);
                out << counter << '|' << endl;
            }
        }
        out << "\\______________________________|________________/" << endl;
        out.close();
    }