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