Join

I need to Join 2008FA to FA08 .How do I do that?  So FA=FA   and 2008   08= 08

I had,

select season,BusSeasncd from AA

left join BB on Left (aa.Season,2) = right (bb.BusSeasncd,2)

and

left join BB on Left (aa.Season,3) = right (bb.BusSeasncd,4)

This did not work. Any suggestion??

SPPandey