So, firstly, it's not very polite to share exactly the same task, you were given during interview (company worker might read this site too) :).
Second: there's no error in testing task - they're just trying to verify your knowledge of Test Design Techniques, especially - Pairwise Testing and Decision Tables (like in this case) .
Read more about this technique here - it's clearly described and has couple of good examples:
http://documents.mx/...ues-luxoft.html
(start from page 25 - "Метод всех пар" and then at 35 - "Таблицы принятия решений")
Have a good luck, pal!
P.S. Sorry for answering in English - don't have Russian keyboard set up.