Eight boys A, B, C, D, E, F and G, H are sitting in a circular table. A and B are sitting in front of each other. D is sitting second from the right of A.  G is sitting second to the right of B.  E and H are sitting in front of each other but E is not immediate neighbour of A . C is sitting between A and G.  How many boys are sitting between F and G, when counted from the right of F?

2