2.1.5 FriCAS

A grade: { 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 23, 24, 25 }

B grade: { 8, 15, 22, 26, 27, 30 }

C grade: { }

F grade: { 28, 29 }