d := (  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
( 19, 36, 52, 67, 81, 94,106,117,127,136,144,151,157,162,166,169,171, 35)
( 20, 37, 53, 68, 82, 95,107,118,128,137,145,152,158,163,167,170, 34, 51)
( 21, 38, 54, 69, 83, 96,108,119,129,138,146,153,159,164,168, 33, 50, 66)
( 22, 39, 55, 70, 84, 97,109,120,130,139,147,154,160,165, 32, 49, 65, 80)
( 23, 40, 56, 71, 85, 98,110,121,131,140,148,155,161, 31, 48, 64, 79, 93)
( 24, 41, 57, 72, 86, 99,111,122,132,141,149,156, 30, 47, 63, 78, 92,105)
( 25, 42, 58, 73, 87,100,112,123,133,142,150, 29, 46, 62, 77, 91,104,116)
( 26, 43, 59, 74, 88,101,113,124,134,143, 28, 45, 61, 76, 90,103,115,126)
( 27, 44, 60, 75, 89,102,114,125,135);