Seven people B, C, D, E, F, G and H are living in a building having seven floors but not necessarily in the same order such as bottommost floor is numbered as 1 to the topmost floor numbered as 7. D lives just above G who lives on a prime numbered floor. There are two floor between E and B. B lives on an even numbered floor. H lives just below F and is not adjacent to B and E. E is not living on top floor. How many floors are there between H and B?