n42 1,2,3,4,5,6,7,8; 0,2,3,9,10,11,12,13; 0,1,3,14,15,16,17,18; 0,1,2,19,20,21,22,23; 0,7,8,9,14,19,24,25; 0,6,8,10,15,20,26,27; 0,5,7,11,16,21,26,28; 0,4,6,12,17,22,24,28; 0,4,5,13,18,23,25,27; 1,4,17,19,25,29,34,38; 1,5,15,23,26,29,31,35; 1,6,16,20,28,35,38,39; 1,7,18,21,25,31,36,39; 1,8,14,22,26,28,34,36; 2,4,13,19,24,30,37,40; 2,5,10,21,27,35,39,40; 2,6,11,22,26,30,32,35; 2,7,9,23,26,27,36,37; 2,8,12,20,24,32,36,39; 3,4,9,14,22,23,29,30; 3,5,11,18,30,31,33,40; 3,6,12,15,29,32,33,38; 3,7,13,16,19,23,31,38; 3,8,10,17,19,22,32,40; 4,7,14,18,28,33,37,38; 4,8,9,12,27,33,34,40; 5,6,10,13,16,17,29,30; 5,8,15,17,25,28,33,39; 6,7,11,13,24,27,33,39; 9,10,19,21,26,30,31,34; 14,16,19,20,26,29,32,37; 10,12,20,22,29,34,35,41; 16,18,21,23,30,35,37,41; 20,21,24,25,27,28,34,37; 9,13,25,29,31,33,37,41; 10,11,15,16,31,32,39,41; 12,13,17,18,38,39,40,41; 14,17,24,30,32,33,34,41; 9,11,21,22,24,36,40,41; 11,12,15,18,27,28,35,36; 14,15,20,23,25,36,38,41; 31,32,34,35,36,37,38,40.