n56 1,2,3,4,5,6,7,8; 0,9,10,11,12,13,14,15; 0,9,16,17,18,19,20,21; 0,10,16,22,23,24,25,26; 0,11,17,22,27,28,29,30; 0,12,18,23,27,31,32,33; 0,13,19,24,28,31,34,35; 0,14,20,25,29,32,34,36; 0,15,21,26,30,33,35,36; 1,2,12,15,33,37,38,39; 1,3,24,26,35,37,46,47; 1,4,19,21,35,38,45,52; 1,5,9,15,21,43,47,54; 1,6,27,30,33,43,45,46; 1,7,22,26,30,39,52,54; 1,8,9,12,19,22,24,27; 2,3,37,41,42,48,49,50; 2,4,29,30,36,39,41,45; 2,5,20,21,36,38,40,42; 2,6,11,15,30,40,48,54; 2,7,18,21,33,45,50,54; 2,8,11,12,18,20,29,49; 3,4,14,15,36,38,47,48; 3,5,34,35,36,43,45,50; 3,6,10,15,26,39,41,43; 3,7,38,39,42,44,45,46; 3,8,10,14,24,34,44,49; 4,5,13,15,35,37,40,41; 4,6,37,39,46,48,52,53; 4,7,17,21,30,40,46,47; 4,8,13,14,17,19,29,53; 5,6,41,42,45,52,54,55; 5,7,37,38,47,50,51,52; 5,8,9,13,20,34,51,55; 6,7,23,26,33,37,40,42; 6,8,10,11,23,27,53,55; 7,8,17,18,22,23,44,51; 9,10,16,27,28,32,34,43; 9,11,18,22,25,32,54,55; 9,14,17,24,25,28,47,51; 18,19,27,29,34,44,45,55; 16,17,24,27,31,44,46,53; 16,18,25,31,34,49,50,51; 12,13,23,24,37,49,51,53; 25,26,36,40,41,47,50,54; 11,13,17,20,23,25,31,40; 10,13,25,28,29,41,49,55; 10,12,22,29,32,39,44,53; 16,19,22,28,51,52,53,55; 16,21,26,42,43,46,50,52; 16,20,23,32,42,44,49,55; 32,33,36,39,42,43,48,54; 11,14,28,31,32,48,49,53; 28,30,35,41,43,47,48,52; 12,14,19,20,31,38,44,51; 31,33,35,38,40,46,48,50.