n40 1,2,3,4,5,6; 0,7,8,9,10,11; 0,7,12,13,14,15; 0,8,12,16,17,18; 0,9,13,16,19,20; 0,10,14,17,19,21; 0,11,15,18,20,21; 1,2,22,23,24,25; 1,3,22,26,27,28; 1,4,23,26,29,30; 1,5,24,27,29,31; 1,6,25,28,30,31; 2,3,25,28,32,33; 2,4,24,29,32,34; 2,5,23,29,33,35; 2,6,22,28,34,35; 3,4,27,30,31,32; 3,5,22,25,31,35; 3,6,26,30,33,35; 4,5,22,23,27,34; 4,6,22,24,26,31; 5,6,24,25,33,34; 7,8,15,17,19,20; 7,9,14,19,36,37; 7,10,13,20,21,36; 7,11,12,17,21,37; 8,9,18,20,36,38; 8,10,16,19,36,39; 8,11,12,15,38,39; 9,10,13,14,38,39; 9,11,16,18,37,39; 10,11,16,17,20,38; 12,13,16,36,37,38; 12,14,18,21,36,39; 13,15,19,21,37,39; 14,15,17,18,37,38; 23,24,26,27,32,33; 23,25,30,32,34,35; 26,28,29,31,32,35; 27,28,29,30,33,34.