Add Range from one list to another

I have a list(of string) and I search it to get a start and end range, I then need to add that range to a separate list

ex: List A = "a" "ab" "abc" "ba" "bac" "bdb" "cba" "zba"

I need List B to be all the b's (3-5)

What I want to do is ListB.Addrange(ListA(3-5))
How can I accomplish this??