bbbb bbdd bbin bd-r bdii bdin bibb bibi bidi bidr biin bin- bind bini binn birb bird biri birn birr bnib bnin bnrr brid brin brrr dbrn dddd dibb didi diii din- dini dinn dird dirr drib drin ibid ibrd ibri idid idin idir iiii inbd ind- indi inid inni innr inri iri- irid irin irri n-ii nddb ndri nibi nidd nidi niir nind nini nndb nnnn nrrd rbbb rbbr rib- ridd ridi riin rind rinn riri rnbr rnin rrrr