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