A grade: { 1, 3, 4, 5, 7, 8, 11, 12, 13, 14, 15, 16, 17, 30, 31, 35, 36, 38, 41, 43, 44, 45, 46, 51, 60, 80, 119, 122, 123, 124, 127, 128, 129 }
B grade: { 9, 10, 37, 39, 40, 42, 47, 120, 121, 125, 131, 132 }
C grade: { 19, 20, 21, 22, 26, 27, 28 }
F grade: { 2, 6, 18, 23, 24, 25, 29, 32, 33, 34, 48, 49, 50, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 126, 130, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153 }