bbbb bbdd bbeb bbpr bd-r bdii bebb bebe bebi bede bedi bedu beeb beed beep beer beir berd bere beri berr beru beur bibb bibe bibi bide bidi bidr bidu bieb bied bier bieu bipp bipu birb bird bire biri birr biru bprd breb bred bree brei brep brer brid brie brrr brud brue brup bubb bube bubi bubu budb budd bude budi budu buer bueu buid buie buir buiu bur- burb burd bure buri burp burr buru dbpd dddd ddie ddre ddub debe debi debu dedd dede dedi dedu deeb deed deep deer deid deie deip deir depe depp depr der- derb dere deri derp derr deue deur dibb dibe dibp dide didi didu dieb died diep dier dieu diii dipe dipp dipu dird dire dirr dper dpie dred dree drei drib drie drip drub drue drui drup druu dub- dubb dube dubu dudd dude dudu duer duid duir dupe dure duri duru duur ebbr ebed eber ebid ebru ebur edde eddi eddp ede- edei eder edie edip edru edup edur eede eedu eeee eid- eide eidi eidr eidu eied eiei eier eipr eird eire epee eper epi- epid epie epip eppp eprb eprp epub erbb erbe erde erdi ereb ered erei erer erie eriu erpe erre erub erur eubi eude euer eur- eure i-be ibed ibid ibie ibrd ibri idbe ided idee ider idid idie idir idre idub iedr ieie iere ieri ieud iide iied iiie iiii ipdi iper ipid ipie ippr ipri ipur irbe irbp irdp ired iree irer iri- irid irie irip irpe irre irri iuiu iupp pbed pdpr ped- pede pedi peed peep peer peip peir pepd pepe pepi per- perd pere peri perp perr peru peur pibb pibi pide pied piep pier piip pipe pipi pipp pire piri pirr piru pper ppib ppid ppie pppd pppp ppru ppur pre- preb pred pree prep preu pri- prid prie prii prpd prrd prri prud prue pruu pu-e pube pubu pudu pued puer pueu puid puir puiu pupe pupi pupu pur- purb pure puri purp purr puru rbbb rbbr rdbp rder rebb rebe rebu redd rede redi redr redu reeb reed reep reid reii reir reiu repe repi repp repr repu rerd rere reri reru reue reup reuu rib- ribe ribu ridd ride ridi ried riep rier rieu ripd ripe ripi ripp ripr rire riri riue rpdp rpii rred rrrr rubb rube rubi rubp rubu rudd rude rudi rudp rued ruer ruid rupe rupp rurd rure ruri rurp ruru ruud u-ie u-rp ubbe ubbi uber ubid ubii ubir ubud uddi uder udid udir udpd ueir uepi uipi uirr upbe uped upie uppe uppp uppu upri upup urbe urbi urde urdu ure- ured urib urie uriu urre urri urup urur uuri uuuu