2.1.5 FriCAS

A grade: { 2, 3, 19, 20, 32, 34 }

B grade: { 1, 18 }

C grade: { 33 }

F grade: { 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 }