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