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