2.1.7 Giac

A grade: { 1, 2, 3, 10, 11, 12, 13, 14, 15, 16, 19, 21, 22, 23, 24, 25, 27, 30, 31, 32, 33, 34, 35, 36, 38, 40 }

B grade: { 4, 26, 37, 42, 43, 44 }

C grade: { }

F grade: { 5, 6, 7, 8, 9, 17, 18, 20, 28, 29, 39, 41 }