Liebnitz Cipher Breaker

This is a cipher system which is similar to ones used by the German mathematician Liebnitz. The letters of the Latin alphabet are enciphered using "binary" blocks of A's and B's.
This page only decodes messages that come in blocks of 5 letters made from A's and B's so don't expect it to do anything else.

Thus A is AAAAA = 0.
B is AAAAB = 1.
C is AAABA = 2.

Try this message:
aabbb aabaa ababa ababa abbab babaa abbab baaaa ababa aaabb