private static void StudentsTask()
        {
            var students = new List <Student>();
            var builder  = new StudentBuilder();

            while (true)
            {
                var student = builder
                              .SetFullName()
                              .SetPassedClasses()
                              .SetCategory()
                              .Build();

                students.Add(student);
                var key = Console.ReadKey(true);

                if (key.Key == ConsoleKey.S)
                {
                    break;
                }
            }

            foreach (var student in students)
            {
                Console.WriteLine(student);
                Console.WriteLine($"Is passed: {student.PassOffset()}");
            }
        }