[OSy] Results of task #4, opt A (labs)

[Vojtech Horky]

Dear all,
I have submitted results from the fourth task (first run) to SIS.

If you have passed, you should see a tick next to "Task 4 (labs)". If 
your implementation does not work as expected, you should find a short 
explanation in "Task 4 (notes)".

Please, contact me ASAP if you find any discrepancies (e.g. you think 
your solution is correct, you sent it but fields in SIS are empty ...).

Thanks,
- VH