One more... Comment In fact, there is one more with 2 in the middle, with vertices labelled (4,3,1,7,9,8). So, recapitulating we have: with 4 in the middle (6,2,1,3,10,5) with 2 in the middle (4,3,1,7,9,8); (4,12,1,3,5,7); (5,3,1,8,4,11) And I think that is! Best Reply
In fact, there is one more with 2 in the middle, with vertices labelled (4,3,1,7,9,8).
So, recapitulating we have:
with 4 in the middle (6,2,1,3,10,5)
with 2 in the middle (4,3,1,7,9,8); (4,12,1,3,5,7); (5,3,1,8,4,11)
And I think that is!
Best