If you have 0 it's Troll.
If you have between 1 and 2, it's Desolate.
If you score between 3 and 4, it's Pietre.
If you score between 5 and 6, it's Acceptable.
7 is Exceptional Effort.
If you score 8, it's Optimal.
To be successful, you need at least an A.
