bbbb bbeb bbet bebb bebe bebi bebo beeb beef beer beet befe beff befo beft beir beit beo- beof beor beot bere beri bero berr bert beru bete beti beto bett betu beur bftt bibb bibe bibi bibo bieb bief bier biet bieu biff bifi bio- bioi biot biou birb bire biri biro birr birt biru bite bito bitt bitu bobb bobe bobi bobo bobu boee boef boeo boer boet bofe boff bofu boi- boie boii boit boiu boob booe boof boor boot bor- bore borf bori boro borr bort boru botb bote boti boto bott boue bouf bour bout breb bree bref brei breo brer bret brfu brie brio brit brob broe broo bror brot brou brrr brue brut btie btob btor btrt bttb bubb bube bubi bubo bubu buer bueu bufe buff bufo bufr buie buif buir buit buiu bur- burb bure buri buro burr burt buru but- bute buti buto butt ebbo ebbr eber ebit eboe eboo ebor ebro ebru ebur eeee eefe eero eete eetu efbr efeo efet effi efit efor eft- eftu eiei eier eiou eire eitb eiti eito eitr eoir eore eori eoto erbb erbe ereb erei erer eret erft erie erio erit eriu erob eroe eroi eroo erre erro ertu erub erur etbr etee eter etfb etfe etio etoe etre etro ette etti etto ettu etui eubi euer eufi euoi eur- eure euro eurt febo feeb feer feet fefe feff fefi fefo feie feio feir feit feof ferb fere fero ferr fert feru fete feti fetr fett fetu ffee ffff ffii ffrr fftf fibe fief fier fife fiff fifi fifo fift fiii fioe fior fire fite fiti fitt fobt foer fofo foie foof foot for- forb fore fori foro forr fort fote foti foto fott four fout free frei freo fret frib frie frio frit frob froe frot frou frub frue fter ftii ftub fubb fubu fuet fuff fufu fuir fuit fuor fur- fure furi furo furr furt fute futi futo futu i-be ibet ibfi ibie ibot ibri ibro ibtb ieet ieie ieio iere ieri ietf iett ifbb ifer ifit ifor ifrb ifrf ifri ifto iiie iiii iiio iiit iioi iioo iitr iitt iobi ioee ioii ioio ioit ioof iooi iooo iore iori iote iotf ioto irbe iree irer irfe irfu iri- irie irio irob irre irri irte irtf irti itbe iter itet itie itif itof itoi itoo itor itou itrf itri ittf itto itur iuef iuiu o-eo obbo ober obet obie obit oboe oboi obor obot obre obri obro oere oeti oeuf ofer off- offe offo offr offu ofit ofor ofre oier oiii oire oirt oiti oobe oobi ooer ooff oooo oore oort ootb orbb orbe orbi orbo orbu ore- oreb oreo orer orfe orff orfi orfu ori- orie orif orio orit oro- oroe orof oror orot orri orro orte orto orub otee oter otif otit oto- otoe otof otoo otor otre otro otte otti otto ottu otur ouer oufe ouff ouie ouii ouir ouit our- oure ouro ourt out- outb oute outi outo ouu- rbbb rbbr rebb rebe rebo rebu reeb reef reet refe reff refi refr reft refu reif reii reir reit reiu reof reot reou rere reri rero rert reru rete reti reto retr rett reue reuf reut reuu rfef rib- ribe ribo ribu rief rier riet rieu rife riff rift rifu riif riot riou rire riri rite riti rito ritt ritu riue rob- robb robe robi robo robt robu roer roet rofe roff rofo roif roio roir roit roiu roob roof rooi roor root rore rori roro rort roru rote roti roto rotr rott roub roue rouf rout rrif rrrr rtbf rtee rtei rtfb rubb rube rubi rubu ruer ruet rufe ruff rufo ruft ruif ruit rure ruri ruro ruru rute ruti ruto rutt rutu tbit tbrb tebo tebu teef teer teet teff tefi teft teie teir teiu teor ter- tere terf teri tero terr teru tete teti teto tetr tett tetu teut tfeb tfot tibi tibu tie- tiee tief tiei tieo tier tiet tiff tifo tift tiit tiiu tiou tirb tire tiri tiro tirr tiru tite titi tito titt titu tobe tobi tobo tobt tobu toee toei toer toet toff tofi tofo toft tofu toie toit toof toor toot tore torf tori toro torr tort toru tote toti toto totr tott toui tour tout tre- tree tref trei treo tret treu trfr tri- trib trie trif trio trit troe troi troo trot trou trte trtr trub true trut truu ttbb tteo tter ttff ttoe tttt tubb tube tubo tubr tubu tuei tuer tuet tufe tuff tufi tufo tuft tufu tuit tuiu tuor turb ture turf turi turo turr turt turu tute tuti tuto tutt tutu tuuo u-ie ubbe ubbi ubbo uber ubet ubii ubir ubit ubtf ueir ufer uffe uirr uofo uor- uore urbe urbi ure- uret urfe urff urfi urft urib urie urif uriu uro- uroo urre urri urte urur urut uter utfo utor utri utti utto uttu uuri uutf uuuu