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