Few people are sitting in a straight row facing north. A is sixth to the left of C. D is in fourth position to the right of A. Exactly two people are sitting between H and A. B is fourth to the right of C. E is an immediate neighbour of both D and C, F is second to the left of E. C is eighth from the right end. There are exactly six persons sitting between G and F. G is third from one of the extreme ends. How many people are sitting in the row in total?