A grade: { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 35, 36, 38, 43, 44, 45, 46, 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 101, 102, 106, 107, 108, 109, 110, 112, 113, 116, 119, 120, 121, 122, 123, 124, 125, 126, 129, 130, 131, 132, 133, 134, 135, 136, 139, 140, 141, 142, 143, 149, 150, 151, 152, 165, 166, 167 }
B grade: { 25, 33, 34, 37, 39, 40, 41, 42, 52, 54, 55, 56, 82, 83, 84, 85, 86, 90, 91, 92, 93, 94, 98, 99, 100, 111, 114, 115, 117, 118, 127, 147, 148, 153, 154 }
C grade: { }
F grade: { 47, 48, 49, 50, 51, 57, 87, 88, 89, 95, 96, 97, 103, 104, 105, 128, 137, 138, 144, 145, 146, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 168, 169, 170 }