bbbb bbdd bbdo bbeb bbpr bd-r bebb bebe bebo bede bedo bedu beeb beed beep beer beo- beod beor bepo berd bere bero berr beru beur bobb bobe bobo bobu bodb bode bodo bodu boee boeo boep boer boob bood booe boop boor bope bopp bor- bord bore boro borr boru boud boue boup bour bpoe bprd brdo breb bred bree breo brep brer brob brod broe broo bror brou brrr brud brue brup bubb bube bubo bubu budb budd bude budo budu buer bueu bur- burb burd bure buro burp burr buru d-bo dbpd dddd ddpo ddre ddub debe debu dedd dede dedo dedu deeb deed deep deer deop deor depe depo depp depr der- derb dere dero derp derr deue deur dobb dobe dobu dod- dodd dode dodo doer doob dood doop door dope dopo dopp dopr dord dore doro dorp dorr doru doub doud doue doup dour dper dred dree drob drod drop drou drub drue drup druu dub- dubb dube dubu dudd dude dudo dudu duer duo- dupe dupo dure duro duru duur ebbo ebbr ebed eber eboe eboo ebor ebpo ebro ebru ebur edde eddo eddp ede- eder edod edou edru edup edur eede eedu eeee eero eode eore epee eper epod epor eppo eppp eprb epro eprp epub erbb erbe erde ereb ered erer erob erod eroe eroo erpe erre erro erub erur eude euer eur- eure euro o-eo obbo obed ober oboe obor obre obro odbo oddd oded odeo oder odoo odop odor odou odrp odur oedo oere oobe ooer oooo oord oore oped opep oper opo- opor oppo orbb orbe orbo orbu orde ordo ordu ore- oreb ored oreo orer oro- oroe oror orpe orro orub orup oude oued ouer oupe our- oure ouro ouu- pbed pdpr ped- pede pedo peed peep peer peor peou pepd pepe pepo per- perd pere pero perp perr peru peur pobo pod- podd pode podo podu poed poer pood poop poor pop- pope popo popp porb pore poro porr poud poup pour pper ppod pppd pppo pppp ppru ppur pre- preb pred pree prep preu pro- prob prod proe proo prop prou prpd prrd prud prue pruu pu-e pube pubu pudo pudu pued pueo puer pueu pupe pupu pur- purb pure puro purp purr puru rbbb rbbr rdbp rder rebb rebe rebo rebu redd rede redo redr redu reeb reed reep reod reop reou repe repo repp repr repu rerd rere rero reru reue reup reuu rob- robb robe robo robu rodd rode rodo roed roer roob rood roop roor rope ropo rore roro roru roub roud roue roup rpdp rpob rpoe rred rrrr rubb rube rubp rubu rudd rude rudo rudp rued ruer rupe rupp rurd rure ruro rurp ruru ruud u-rp ubbe ubbo uber ubod ubud uder udoo udop udpd uor- uore upbe updo uped upor uppe uppp uppu upup urbe urde urdu ure- ured uro- uroo urpo urre urup urur uuuu