n56 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; 2,4,23,32,34,35; 2,5,24,33,34,36; 2,6,22,28,35,36; 3,4,26,32,37,38; 3,5,27,33,37,39; 3,6,22,25,38,39; 4,5,29,34,37,40; 4,6,30,35,38,40; 5,6,31,36,39,40; 7,8,15,18,41,42; 7,9,13,41,43,44; 7,10,14,42,43,45; 7,11,12,18,44,45; 8,9,16,41,46,47; 8,10,17,42,46,48; 8,11,12,15,47,48; 9,10,19,43,46,49; 9,11,20,44,47,49; 10,11,21,45,48,49; 12,13,16,44,47,50; 12,14,17,45,48,50; 13,14,19,43,50,51; 13,15,20,41,47,51; 14,15,21,42,48,51; 16,17,19,46,50,52; 16,18,20,41,44,52; 17,18,21,42,45,52; 19,20,21,49,51,52; 22,23,26,35,38,53; 22,24,27,36,39,53; 23,24,29,34,53,54; 23,25,30,32,38,54; 24,25,31,33,39,54; 26,27,29,37,53,55; 26,28,30,32,35,55; 27,28,31,33,36,55; 29,30,31,40,54,55; 32,33,34,37,54,55; 34,35,36,40,53,55; 37,38,39,40,53,54; 41,42,43,46,51,52; 43,44,45,49,50,52; 46,47,48,49,50,51.