bbbb bbeb bbpr bebb bebe bebi beeb beej beep beer beij beir bere beri berr beru beur bibb bibe bibi bieb bier bieu biji biju bipp bipu birb bire biri birr biru breb bree brei brep brer brie brje brrr brue brup bubb bube bubi bubu buer bueu buie buir buiu buje buji buju bur- burb bure buri burj burp burr buru ebbr eber ebru ebur eeee eiei eier eiji eipr eire ejer ejji epee eper epi- epie epip eppp eprb eprp epub erbb erbe ereb erei erer erie eriu erpe erre erub erur eubi euer eur- eure i-be ibie ibri ieie iere ieri iiie iiii ijji ijui iper ipie ippr ipri ipur irbe irbp iree irer iri- irie irip irje irpe irre irri iuiu iupp jebb jebe jeep jeer jeju jere jeri jeru jeur jibb jibe jibi jije jiji jiju jipe jiri jiru jpip jrbr jube jubu juei juip juju jupe jupi jupp jupu jure juri jurr peep peer peip peir peje pepe pepi per- pere peri perp perr peru peur pibb pibi piep pier piip pipe pipi pipp pire piri pirr piru pper ppib ppie pppp ppru ppur pre- preb pree prep preu pri- prie prii prri prue pruu pu-e pube pubu puer pueu puir puiu puju pupe pupi pupu pur- purb pure puri purp purr puru rbbb rbbr rbpj rebb rebe rebu reeb reep reii reir reiu repe repi repp repr repu rere reri reru reue reup reuu rib- ribe ribu riep rier rieu riji rijp ripe ripi ripp ripr rire riri riue rpii rrrr rubb rube rubi rubp rubu ruer rupe rupp rure ruri rurp ruru u-ie u-rp ubbe ubbi uber ubii ubir ueir uepi uipi uirr upbe upie uppe uppp uppu upri upup urbe urbi ure- urib urie uriu urre urri urup urur uuri uuuu