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