bbbb bbeb bbpr bebb bebe bebi beby beeb beep beer beey beir bere beri berr beru bery beur beye beyi bibb bibe bibi bieb bier bieu bipp bipu birb bire biri birr biru biry breb bree brei brep brer brey brie brrr brue brup bry- brye bubb bube bubi bubu buer bueu buie buir buiu bur- burb bure buri burp burr buru bury buyi buyu byer byre ebbr ebby eber ebru ebur eeby eeee eery eiei eier eipr eire eiry epee eper epi- epie epip eppp eppy eprb eprp epub erbb erbe ereb erei erer erie eriu erpe erre erub erur erye eubi euer eur- eure eury eyeb eyer eyey eyir eype eyre eyry eyup eyyr i-be i-by ibie ibri ibuy ibyi ieie iere ieri iiie iiii iper ipie ippr ippy ipri ipur irbe irbp irby iree irer iri- irie irip iriy irpe irre irri iuiu iupp iyer iyre peep peer peip peir pepe pepi per- pere peri perp perr peru pery peur peyr pibb pibi piep pier piip pipe pipi pipp pipy pire piri pirr piru piry piye pper ppib ppie pppp ppru ppur ppye pre- preb pree prep preu prey pri- prie prii prri prue pruu pu-e pube pubu puer pueu puir puiu pupe pupi pupu pupy pur- purb pure puri purp purr puru pury puy- puyi pyep pype pypy pyr- pyre pyri pyry rbbb rbbr rebb rebe rebu reeb reep reii reir reiu repe repi repp repr repu repy rere reri reru rery reue reup reuu reye rib- ribe ribu riby riep rier rieu ripe ripi ripp ripr rire riri riue rpii rrrr rubb rube rubi rubp rubu ruby ruer rupe rupp rupy rure ruri rurp ruru ruyi rybe rybp ryeb ryip rype ryue u-ie u-rp ubbe ubbi uber ubii ubir ueir uepi uipi uirr upbe upby upie uppe uppp uppu uppy upri upup urbe urbi ure- urey urib urie uriu urre urri urry urup urur uuri uuuu uyir uyre yber ybry ye-u yeep yeer yeie yeii yeir yepe yepp yerb yere yeri yerr yery yeue yeye yeyi yeyr yipe yirb yire yirr ypir yubu yuer yuie yupi yure yuri yury yuye yuyu yyyy