I am working with strings of 4 letter alphabet a,c,t,g that describe
biological dna sequences. sometimes a sequence can be described as
ac[ta]cct meaning that at position 3 you are can have 't 'or an ‘a’
without changing the biological function of the sequence.
Given ac[ta]cct as input i would like to generate a set of strings such
that it gives me the various combination of the strings that can
represent the above degenerate sequence e.g
both satisfy the above degeneracy.