oro- oroe oror orot orpe orpi orri orro orte orto orub orup otbd oted otee otep oter otit oto- otoe otog otoo otor otpp otre otro otte otti otto ottu otur oude oued ouer ouge ouie ouii ouir ouit oupe our- oure ouro ourt out- outb oute outi outo ouu- pbed pdpr ped- pede pedi pedo peed peep peer peet pegg pego pegu peio peip peir peit peor peou pepd pepe pepi pepo per- perd pere perg peri pero perp perr pert peru pete peti peto petr pett peur peut pgde pger pgib pgou pgpu pgup pibb pibi pide pido pied piep pier piet pigb pigg pigo pigp pigt pigu piip piob piot pipe pipi pipo pipp pire pirg piri piro pirr piru pite piti pito pitr pitt pitu pobo pod- podd pode podi podo podu poed poer poet poge pogg pogo poid poio pood poop poor poot pop- pope popi popo popp popt porb pore porg pori poro porr port potd pote poti poto pott potu poud poui poup pour pout pper ppgi ppib ppid ppie ppig ppod pppd pppo pppp ppru pptt ppur pre- preb pred pree preg prep pret preu pri- prid prie prig prii pro- prob prod proe prog proo prop prot prou prpd prrd prri prti prtp prtr prud prue prut pruu pter ptop ptpd ptrd ptui pu-e pube pubu pudo pudu pued pueo puer puet pueu pugo pugu puid puig puir puit puiu pupe pupi pupu pur- purb pure purg puri puro purp purr puru put- pute puti puto putt putu rbbb rbbr rdbp rder rdio rebb rebe rebo rebu redd rede redi redo redr redu reeb reed reep reet regd rege regi rego regr regt regu reid reii reir reit reiu reod reog reop reot reou repe repi repo repp repr rept repu rerd rere rerg reri rero rert reru retd rete reti reto retr rett reue reup reut reuu rgbe rgbi rgit rgtr rib- ribe ribo ribu ridd ride ridi rido ried riep rier riet rieu rige rigg rigi rigo rigu riot riou ripd ripe ripi ripp ripr ript rire riri rite riti rito ritt ritu riue rob- robb robe robi robo robt robu rodd rode rodi rodo roed roeg roer roet roge rogg rogi rogo roid roig roio roir roit roiu roob rood roog rooi roop roor root rope ropo rore rori roro rort roru rote rotg roti roto rotr rott roub roud roue roup rout rpdp rpet rpii rpob rpoe rptd rred rrrr rtdt rtee rtei rttp rubb rube rubi rubp rubu rudd rude rudi rudo rudp rued ruer ruet ruge rugg rugi ruid ruit rupe rupp rupt rurd rure ruri ruro rurp ruru rute ruti ruto rutt rutu ruud tbit tbrb tbtp tddb tdor tdri tebo tebu tedd tede tedi teed teer teet tegg tegi tego tegt tegu teie teip teir teiu teor tepe tepi tepp tepu ter- tere teri tero terp terr teru tete teti teto tetr tett tetu teut tibi tibu tidd tide tie- tied tiee tiei tieo tiep tier tiet tige tigi tigr tiit tiiu tiop tiou tip- tipe tipi tipo tipp tipt tipu tirb tird tire tiri tiro tirr tiru tite titi tito titp titt titu tobe tobi tobo tobt tobu todd tode todi todo todt todu toed toee toei toer toet toge togo togr togt toid toie toit tood toor toot top- topd tope topi topo topp topt topu tord tore torg tori toro torp torr tort toru totd tote toti toto totr tott toug toui toup tour tout tpbg tpdu tped tpeg tper tpir tppd tppp tppr tpte tptp tptr tput tre- tred tree treg trei treo tret treu trge tri- trib trie trig trio trip trit trod troe trog troi troo trop trot trou trpe trpg trpp trte trtr trub trud true trug trut truu ttbb tteo tter ttoe ttop tttt tubb tube tubo tubr tubu tude tudi tudu tuei tuer tuet tugg tugu tuig tuit tuiu tuor tupe tupi tupo tupu turb turd ture turg turi turo turp turr turt turu tute tuti tuto tutt tutu tuuo u-ie u-rp ubbe ubbi ubbo uber ubet ubid ubii ubir ubit ubod ubud uddi uder udet udgb udge udid udig udir udoo udop udot udpd ueir uepi ugeo ugep uggo uggt ugod ugri ugro ugur uguu uige uipi uirr uor- uore upbe updo uped upgo upie upor uppe uppp uppu upri upto upup urbe urbi urde urdu ure- ured uret urge urgi urgu urib urie uriu uro- uroo urpo urre urri urte urup urur urut utep uter utid utor utpd utri utti utto uttu utug uuri uuuu

-tree b-e-d bbbee bd-re bdoor bdort be-er be-ro bebdo bebed beber bebod bebog bebop bebot bebti bedde bedee beder bedet bedid bedip bedog bedot bedri bedub bedue bedug beebe beede beedi beepi beerd beeri beete beeut begee beget begge begob begod begor begot begti begto begue begur begut beibi beide beidi beidu beier beige beipu beird beire beite beode beoir beord beote beour bepop beppe beppo beppu berbe berde berdu bered bereg berei beret berge bergi berid berie berig berio berit beriu berob beroe beror berre berri berru berte berti berto betee beter betid betie betio betoo betor betou betre bett- bette betti betto beuer beure beute bibbe bibbo biber bibie bibio bibod bibri bidde biddu bided bider bidet bidor bidri bidup bidur biebe bierd biere bieri biert bieti bieup big-i bigdo bigge bigig bigod bigoo bigot biide biore bioue biped bipib bipod birde birdo birdu birgi birgu birie birou birur bited biter bitgo bitit bitop bitru bitte bitti bitto bitup biure bo-bo bobbi bobet bobr bobre bobri bobup bodd- boded boder bodge bodie bodig bodio bodir bodiu bodoe bodog bodor bodri boedo boege boero boeur boger boget bogge bogie bogoe bogor bogot bogu bogud bogue bogur bogut boibe boier boire boiro boite boito boode booed booer booit boord boore boort booru bopet bopit borbo borde bordi bordo bored boree borer boret borge borgo borgu borid borio boro- borod boroo borot borou borre borro borup borut botet