n80 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; 1,2,37,38,39,40,41,42; 1,3,37,48,50,52,53,54; 1,4,38,44,49,50,61,62; 1,5,39,47,48,58,60,62; 1,6,40,47,53,61,63,65; 1,7,41,44,52,58,63,64; 1,8,42,49,54,60,64,65; 2,3,42,43,52,55,64,66; 2,4,37,49,51,54,55,57; 2,5,38,52,54,62,63,65; 2,6,39,51,56,60,65,66; 2,7,41,43,49,59,60,62; 2,8,40,56,57,59,63,64; 3,4,37,41,43,44,45,46; 3,5,45,53,56,58,63,66; 3,6,41,42,50,58,60,61; 3,7,46,48,56,60,64,67; 3,8,44,54,55,61,63,67; 4,5,43,50,54,60,66,67; 4,6,38,41,55,59,63,66; 4,7,45,47,57,62,63,67; 4,8,46,47,51,59,60,61; 5,6,37,38,45,47,50,51; 5,7,37,39,43,52,56,57; 5,8,48,51,53,57,65,67; 6,7,39,40,45,46,58,59; 6,8,37,42,46,53,55,56; 7,8,37,40,44,47,48,49; 9,10,17,22,31,32,35,36; 9,11,18,28,31,68,69,70; 9,12,19,32,34,69,71,72; 9,13,21,34,36,70,73,74; 9,14,20,22,24,28,71,73; 9,15,16,24,35,68,72,74; 16,20,22,27,32,72,75,76; 11,14,22,26,36,70,75,77; 22,23,29,31,34,70,71,76; 22,25,30,34,35,72,73,77; 12,13,29,30,31,36,69,77; 10,12,25,33,36,72,74,75; 11,15,17,20,36,69,72,73; 10,11,24,27,31,71,72,77; 17,19,30,31,33,68,72,76; 10,14,16,18,32,70,71,74; 10,13,23,33,35,68,70,77; 10,15,17,18,26,27,68,75; 16,17,26,28,35,70,73,76; 19,21,23,25,32,35,74,76; 17,21,29,32,33,69,70,75; 12,14,23,24,34,74,77,78; 20,21,28,30,34,69,76,78; 12,15,19,20,24,25,27,30; 11,13,24,26,30,68,73,78; 11,12,18,20,29,71,75,78; 13,14,18,21,23,26,28,29; 14,15,16,21,25,73,75,78; 13,15,18,19,33,69,74,78; 16,19,23,27,28,68,71,78; 25,26,27,29,33,76,77,78; 38,42,51,53,54,61,66,79; 38,39,47,49,57,59,65,79; 38,40,44,45,52,53,55,57; 39,41,45,50,52,62,66,79; 39,42,43,46,48,49,50,51; 40,41,46,49,55,61,64,79; 40,42,48,52,56,58,65,79; 43,44,48,54,57,62,64,79; 43,45,51,55,56,59,67,79; 44,46,47,50,53,58,67,79; 58,59,61,62,64,65,66,67; 68,69,71,73,74,75,76,77.