n = 13: 0,1,11,(5,9) 0,4,8,(9,10) 0,1,(1,7),(3,7) 0,1,(2,3),(6,11) 0,1,(2,5),(5,11) 0,1,(2,6),(6,8) 0,1,(2,9),(4,5) 0,2,(1,6),(9,12) 0,2,(7,10),(10,12) 0,3,(1,9),(2,11) 0,3,(4,6),(9,11) 0,3,(8,9),(9,10) 0,4,(1,3),(4,6) 0,4,(1,3),(10,12) 0,4,(2,9),(8,10) 0,5,(1,5),(4,9) 0,5,(1,12),(7,11) 0,5,(2,9),(4,5) 0,5,(3,6),(4,9) 0,5,(3,12),(9,11) 0,6,(1,5),(2,12) 0,1,2,4,5,(1,7) 0,1,2,10,11,(6,12) 0,1,3,4,6,(6,10) 0,1,4,5,10,(4,8) 0,1,5,6,7,(5,9) 0,1,5,7,9,(8,9) 0,1,5,7,11,(8,10) 0,1,7,10,11,(2,6) 0,1,8,9,10,(8,9) 0,2,3,8,11,(1,10) 0,2,5,6,11,(8,11) 0,2,6,7,10,(8,12) 0,3,4,5,12,(4,5) 0,3,5,6,10,(8,11) 0,3,5,7,10,(2,10) 0,1,2,(6,8,10) 0,1,5,(3,11,12) 0,1,7,(1,5,11) 0,1,7,(3,9,10) 0,1,7,(4,5,6) 0,2,8,(8,10,12) 0,3,7,(6,9,12)