bbbb bbeb bbpr bebb bebe bebi beeb beem beep beer beim beir beme bere beri berm berr bibb bibe bibi bieb bier bipm bipp birb bire biri birr bmep bmir bmmi breb bree brei brem brep brer brie brim brrm brrr ebbr eber eeee eiei eier eime eimi eipr eire embe embi embr emer emii emim emir emme emmi empe empi emre epbm epee eper epi- epie epip eppp eprb eprp erbb erbe ereb erei erem erer erie erim erme erpe erre i-be ibbm ibie ibim ibmp ibri ieie ieme iere ieri iiie iiii iipm imbe imbi imep imer imir imme immi impi impr imre imri imrr iper ipie ipmi ipmp ippr ipri irbe irbm irbp iree irem irer iri- irie irip irpe irre irri mbim mebe meem meep meer meir meme memr mepe mer- merb mere meri merm merp miee miem miep mier miii mim- mime mimi mimp mipi mipr mire miri mirr mmii mmmm mmpi mmpr mmrp mpie mpir mppe mppp mpri mprp mrbb mrbm mreb mree pbmr peep peer peip peir pepe pepi per- pere peri perm perp perr pibb pibi piem piep pier piip pime pimi pimp pipe pipi pipp pire piri pirr pmbr pmip pmmp pmpm pper ppib ppie pppp pprm pre- preb pree prem prep pri- prie prii prim prri prrm rbbb rbbr rebb rebe reeb reem reep reii reim reir reme remi remp repe repi repp repr rere reri rib- ribe riem riep rier rime rimi rimm ripe ripi ripp ripr rire riri rmrp rpii rrmp rrrr