Distribute list - using IP access lists
access-list 1 deny 10.0.0.0
access-list 2 permit 20.0.0.0
… more access-list lines as prefixes are added ...
neighbor 171.69.233.33 remote-as 33
neighbor 171.69.233.33 distribute-list 1 in
neighbor 171.69.233.33 distribute-list 2 out