bbbb bbdd bbdo bbeb bd-r bduf bebb bebe bebo bede bedo bedu beeb beed beef beek beer befe beff befo beke beko beo- beod beof beok beor berd bere berk bero berr beru beuk beur bobb bobe bobo bobu bodb bode bodo bodu boee boef boeo boer bofd bofe boff bofu boke boko boku boob bood booe boof book boor bor- bord bore borf bork boro borr boru boud boue bouf bouk bour brdo breb bred bree bref brek breo brer brfu brkb brob brod broe brok broo bror brou brrr brud brue bubb bube bubo bubu budb budd bude budo budu buer bueu bufe buff bufo bufr buke bukk buko buku bur- burb burd bure burk buro burr buru d-bo dbfo dddd ddre ddub debe debu dedd dede dedo dedu deeb deed deef deek deer defe deff defo dek- deke deor der- derb dere derf derk dero derr deue deuk deur dfer dfoe dfrf dobb dobe dobu dod- dodd dode dodo doek doer doff doke doko doob dood doof dook door dord dore dorf dork doro dorr doru doub doud doue douf douk dour dred dree dref drek drob drod drof drou drub drue druk druu dub- dubb dube dubu dudd dude dudo dudu duer duff dufu duke duku duo- dure durk duro duru duur ebbo ebbr ebed eber eboe eboo ebor ebro ebru ebur edde eddo ede- eder edfu edod edou edru edur eede eedu eeee eefe eeke eero efbr efeo efke efor ekeb eked ekek eker ekur eode eore erbb erbe erde erdf ereb ered erer erke erob erod eroe eroo erre erro erub erur eude euer eur- eure euro f--k febo fede feeb feed feek feer fefe feff fefo feke feko feod feof ferb ferd fere ferk fero ferr feru feud ffee ffff ffrr fode foed foer fofo foke food foof fook for- forb ford fore fork foro forr foud four fred free freo frob froe frou frub frue fubb fubu fudd fude fuff fufu fuke fukk fuko fuku fuor fur- fure furo furr kbbb kbbd kbbe kbbf kbbk kbbo kbbr kbbu kbdb kbde kbdf kbdo kbdr kbeb kbed kbee kbef kbek kbeo kber kbfb kbff kbfk kbfo kbfr kbkb kbkf kbkk kbko kbkr kbob kbod kboe kbok kboo kbrb kbrd kbre kbrf kbrk kbro kbru kbub kbud kbue kbuf kbuk kbur kbuu kdbb kdbr kddb kddd kddf kddk kddr kdeb kdef kdfo kdfr kdkb kdkd kdkk kdko kdkr kdoe kdok kdrb kdrf kdro kdub kdur kebb kebe kebr kebu kedb kedd kede kedo kedr keed keef keek keer kefb keff kefr kekb keke keko keku keok ker- kerb kere kerf kerk kero kerr keru keur kfbk kfeb kfed kfer kffb kfff kffk kfkb kfok kfoo kfor kfrd kfre kfro kfrr kfru kfuo kkbb kkbd kkbe kkbo kkbr kkdd kkdo kked kkfr kkkk kkob kkoo kkor kkrb kkre kkrf kkrk kkro kkrr kkuu kobb kobe kobk kobo kobr kobu kode kodk kodo kodu koed kofe koff kofk kofo kofu kokb koke kokf kokk koko kokr koku koob kook kooo koor koou korb kord kore korf kork koro korr koru koub koue kour kouu krbb krbd krbe krbk krbr krdd krde krdo krdr krdu kreb kred kree kref krek kreo kreu krfd krfe krff krfo krkd krke krkk krko krkr krku krob krod kroe krof krok kroo kror krrb krre krrf krrk krro krrr krue kruf kruk krur kubb kubd kube kubo kubr kubu kudd kude kudo kudu kued kuek kueu kuff kufo kufr kuke kukk kuku kuok kuoo kurb kurd kure kurk kuro kurr kuru kuub kuuk kuur kuuu o-eo obbo obed ober obkb oboe obok obor obre obro odbo oddd oded odeo oder odoo odor odou odur oedo oere oeuf ofdr ofek ofer off- offe offo offr offu ofor ofre oked oker okko okok okor okre okro okur oobe ooer ooff ooku oooo oord oore orbb orbe orbo orbu orde ordo ordu ore- oreb ored orek oreo orer orfe orff orfu orke orko oro- oroe orof orok oror orro orub oude oued ouer oufe ouff our- oure ouro ouu- rbbb rbbr rder rebb rebe rebk rebo rebu redd rede redo redr redu reeb reed reef reek refd refe reff refr refu reke reko reod reof reou rerd rere rero reru reue reuf reuk reuu rfef rkkf rob- robb robe robo robu rodd rode rodo roed roer rofe roff rofo roke rokk roko rokr roku roob rood roof rook roor rore rork roro roru roub roud roue rouf rouk rred rrrr rubb rube rubu rudd rude rudo rued ruer rufe ruff rufo ruke rukk ruku ruok rurd rure ruro ruru ruud ubbe ubbo ubek uber ubod ubud uder udoo uduk ufer uffe ufuk ukek ukeu ukko ukok ukur uofo uoke uor- uore urbe urde urdu ure- ured urfe urff urke uro- urok uroo urre uruk urur uuuu