n80 1,2,3,4,5,6,7,8; 0,4,7,9,10,11,12,13; 0,9,14,15,16,17,18,19; 0,10,14,20,21,22,23,24; 0,1,7,15,20,25,26,27; 0,11,16,21,25,28,29,30; 0,12,17,22,26,28,31,32; 0,1,4,18,23,29,31,33; 0,13,19,24,27,30,32,33; 1,2,26,31,34,35,36,37; 1,3,15,18,34,38,39,40; 1,5,20,23,35,38,50,51; 1,6,25,29,36,39,50,58; 1,8,27,33,37,40,51,58; 2,3,34,41,43,45,46,47; 2,4,10,23,36,41,50,53; 2,5,22,23,31,45,62,65; 2,6,35,43,50,59,61,62; 2,7,10,22,26,46,54,59; 2,8,37,47,53,54,61,65; 3,4,11,29,38,43,50,57; 3,5,39,41,50,60,62,63; 3,6,16,18,29,45,62,64; 3,7,11,15,16,46,55,60; 3,8,40,47,55,57,63,64; 4,5,12,31,34,38,41,42; 4,6,9,18,34,36,43,44; 4,8,13,33,42,44,53,57; 5,6,34,35,39,45,48,49; 5,7,12,20,22,48,52,60; 5,8,42,49,51,52,63,65; 6,7,9,16,25,48,56,59; 6,8,44,49,56,58,61,64; 7,8,13,27,52,54,55,56; 9,10,14,25,26,28,36,67; 9,11,17,28,43,46,59,68; 9,12,15,26,34,46,48,69; 9,13,19,44,56,67,68,69; 10,11,20,25,50,59,60,70; 10,12,21,28,41,46,60,72; 10,13,24,53,54,67,70,72; 14,15,21,25,39,48,60,71; 25,27,30,56,58,67,70,71; 14,17,20,26,35,48,59,73; 26,27,32,37,54,67,69,73; 14,16,22,28,59,60,62,75; 14,18,23,35,36,39,62,74; 14,19,24,67,71,73,74,75; 28,29,31,36,41,43,62,76; 28,30,32,67,68,72,75,76; 11,12,15,17,20,21,38,66; 11,13,30,55,57,66,68,70; 29,30,33,57,58,64,76,77; 15,19,27,40,55,66,69,71; 18,19,33,40,44,64,74,78; 23,24,33,51,53,65,74,77; 31,32,33,37,42,65,76,78; 20,24,27,51,52,66,70,73; 12,13,32,42,52,66,69,72; 17,18,31,35,38,43,45,78; 21,23,29,38,39,41,45,77; 17,19,32,66,68,73,78,79; 16,17,21,22,45,46,48,79; 21,24,30,66,71,72,77,79; 22,24,32,52,54,65,75,79; 16,19,30,55,56,64,75,79; 50,51,53,57,58,61,63,70; 34,37,40,42,44,47,49,69; 35,37,49,51,61,73,74,78; 36,37,44,53,58,67,74,76; 38,40,42,51,57,66,77,78; 41,42,47,53,63,72,76,77; 39,40,49,58,63,71,74,77; 43,44,47,57,61,68,76,78; 46,47,54,55,68,69,72,79; 45,47,49,64,65,77,78,79; 48,49,52,56,69,71,73,79; 52,55,60,63,70,71,72,75; 54,56,59,61,68,70,73,75; 61,62,63,64,65,74,75,76.