A grade: { 1, 2, 3, 4, 5, 6, 7, 10, 11, 13, 15, 16, 17, 18, 19, 20, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 36, 37, 38, 41, 43, 46, 51, 52, 53, 54, 55, 57, 58, 59, 62, 63, 65, 66, 67, 68, 69, 71, 74, 76, 77, 78, 79, 80, 83, 84, 85, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 106, 118, 119, 120, 121, 125, 127, 130, 131, 132, 133, 142, 143, 148, 149, 153, 154, 155, 159, 164, 167, 168, 169, 171, 172, 173, 174, 177, 181, 182, 185, 186, 190, 192, 193, 195, 199, 200, 201, 202, 215, 216, 217, 218, 219, 221, 222, 223, 225, 226, 227, 229, 230, 231, 232, 233, 234, 237, 239, 240, 241, 243, 244, 245, 250, 252, 253, 254, 255, 258, 259, 260, 261, 262, 263, 264, 266, 267, 268, 269, 270, 271, 272, 274, 276, 277, 280, 282, 283, 284 }
B grade: { 8, 39, 44, 81, 82, 178, 179, 180, 183, 184, 189, 204, 228, 246, 247, 256 }
C grade: { 9, 14, 22, 23, 31, 35, 40, 42, 45, 47, 48, 49, 50, 56, 60, 61, 64, 70, 72, 73, 102, 103, 104, 105, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 122, 123, 124, 126, 134, 135, 136, 137, 138, 139, 140, 141, 144, 150, 151, 152, 156, 157, 158, 161, 165, 166, 175, 188, 191, 194, 203, 205, 206, 209, 210, 220, 224, 248, 275 }
F grade: { 12, 21, 75, 86, 128, 129, 145, 146, 147, 160, 162, 163, 170, 176, 187, 196, 197, 198, 207, 208, 211, 212, 213, 214, 235, 236, 238, 242, 249, 251, 257, 265, 273, 278, 279, 281 }