The exam starts at 13:00 Finnish time on Dec 15 and it lasts for 2:45. It will close 15:45 Finnish time. This is open together with the full exam that lasts 3:00. You can look at both exams and then choose which one to do. You are also free try both, if you have time. The best result will stand.
Let me know by e-mail, if you have issues of not getting in or something else.