bbbb bbdd bd-r bddh bdii bhir bhit bhrt bibb bibi bidi bidr bihi birb bird biri birr birt bitd bith bitt brdt brid brih brit brrr btdt btrt bttb dbit dbtt dddd dibb didi diii dird dirr dirt dith diti ditt drib drih drit dthd h-ii hbit hdri hdtt hhhh hibi hibt hidi hihi hiht hiit hird hiri hirt hiti hitt hrib hrid hrit hrtb httr ibid ibrd ibri ibtb idid idir ihdr ihit ihrd iiht iiii iiit iitr iitt iri- irid irri irti itri rbbb rbbr rhib rib- ridd ridi riht riri rith riti ritt rrrr rtdt tbit tbrb tddb tdri thdr thi- thir thri thtb thtr tibi tidd tiht tiit tirb tird tiri tirr tith titi titt tri- trib trit trtr ttbb tttt