Eight persons A, B, C, D, E, F, G, and H are sitting around an octagonal table (not necessarily in that order) and faces towards the centre. A is sitting third to the right of G and second to the left of C, B is diagonally opposite to A and sitting third to the right of E. F and D are immediate neighbours of each other. D is sitting diagonally opposite to C. What is the position of  H with respect to A?