bbbb bbeb bbpr bebb bebe bebi bebo beeb beej beep beer beij beir beo- beor bepo bere beri bero berr bibb bibe bibi bibo bieb bier biji bio- bioi bipp birb bire biri biro birr bobb bobe bobi bobo boee boeo boep boer boi- boie boii boji bojo boob booe boop boor bope bopp bor- bore bori borj boro borr bpoe breb bree brei breo brep brer brie brio brje brob broe broo bror brrr ebbo ebbr eber eboe eboo ebor ebpo ebro eeee eero eiei eier eiji eipo eipr eire ejer ejji ejob ejoo eoir eore eori epee eper epi- epie epip epor eppo eppp eprb epro eprp erbb erbe ereb erei erer erie erio erob eroe eroi eroo erpe erre erro i-be ibie ibri ibro ieie ieio iere ieri iiie iiii iiio iioi iioo iiop ijji iobi ioee ioii ioio iooi iooo iore iori iper ipie ipoe ipop ippo ippr ipri irbe irbp iree irer iri- irie irio irip irje irob irop irpe irre irri j-ro jbob jebb jebe jeep jeer jere jeri jero jibb jibe jibi jije jiji jipe jiri jiro jobe jobo joee joie joio joji jojo joor jope jore joro jpip jpop jrbr o-eo obbo ober obie oboe oboi obor obre obri obro oere oier oiii oire oobe oobi ooer ooij ooji oooo oore opei opep oper opie opii opio opo- opoj opor oppi oppo orbb orbe orbi orbo ore- oreb oreo orer ori- orie orio orji oro- oroe oror orpe orpi orri orro peep peer peio peip peir peje peor pepe pepi pepo per- pere peri pero perp perr pibb pibi piep pier piip piob pipe pipi pipo pipp pire piri piro pirr pobo poer poio poji pojo poop poor pop- pope popi popo popp porb pore pori poro porr pper ppib ppie pppo pppp pre- preb pree prep pri- prie prii pro- prob proe proj proo prop prri rbbb rbbr rbpj rebb rebe rebo reeb reep reii reir reop repe repi repo repp repr rere reri rero rib- ribe ribo riep rier riji rijo rijp ripe ripi ripp ripr rire riri rob- robb robe robi robo roer roio roir roje roji rojo roob rooi roop roor rope ropo rore rori roro rpii rpob rpoe rrrr