oobi oodi ooer ooid oone oont oooo oord oore oort ootb orbb orbe orbi orbo orbu orde ordn ordo ordu ore- oreb ored oren oreo orer ori- orid orie orin orio orit orne orni orno oro- oroe oron oror orot orri orro orte orto orub otbd oted otee oten oter otin otit oto- otoe oton otoo otor otre otro otte otti otto ottu otur oude oued ouen ouer ouie ouii ouin ouir ouit oun- ound oune our- oure ourn ouro ourt out- outb oute outi outo ouu- rbbb rbbr rder rdio rebb rebe rebo rebu redd rede redi redo redr redu reeb reed reen reet reid reii rein reir reit reiu rend rene reni renn reno rent renu reod reot reou rerd rere reri rero rert reru retd rete reti reto retr rett reue reut reuu rib- ribe ribo ribu ridd ride ridi rido ried rien rier riet rieu riin rind rine rinn rino rion riot riou rire riri rite riti rito ritt ritu riue rnbr rnie rnin rnnt rnod rnot rntd rnut rob- robb robe robi robo robt robu rodd rode rodi rodo roed roen roer roet roid roin roio roir roit roiu rond rone roni rono ront roob rood rooi roon roor root rore rori roro rort roru rote roti rotn roto rotr rott roub roud roue roun rout rred rrrr rrun rtdt rtee rtei rtnd rubb rube rubi rubu rudd rude rudi rudo rued ruen ruer ruet ruid ruin ruit rund rune runi runn runo runt rurd rure ruri ruro ruru rute ruti ruto rutt rutu ruud ruun tbit tbrb tddb tdor tdri tebo tebu tedd tede tedi teed teen teer teet teie tein teir teiu tenb tend tene teni tenn teno tent tenu teon teor ter- tere teri tern tero terr teru tete teti teto tetr tett tetu teut tibi tibu tidd tide tie- tied tiee tiei tien tieo tier tiet tiit tiiu tind tine tini tinn tino tint tinu tion tiou tirb tird tire tiri tiro tirr tiru tite titi tito titt titu tndd tneb tnut tobe tobi tobo tobt tobu todd tode todi todo todt todu toed toee toei toen toer toet toid toie toit tonb tone toni tonn tono tonu tood toon toor toot tord tore tori torn toro torr tort toru totd tote toti toto totr tott toui toun tour tout tre- tred tree trei tren treo tret treu tri- trib trie trin trio trit trno trod troe troi tron troo trot trou trte trtr trub trud true trun trut truu ttbb tten tteo tter ttoe tton tttt tubb tube tubo tubr tubu tude tudi tudu tuei tuen tuer tuet tuin tuit tuiu tunb tund tune tuni tunn tuno tunu tuor turb turd ture turi turn turo turr turt turu tute tuti tuto tutt tutu tuuo u-ie ubbe ubbi ubbo uber ubet ubid ubii ubir ubit ubod ubon ubud uddi uden uder udet udid udin udir udon udoo udot udun uein ueir uend ueno uint uirr unbd unbe unde undi undo uneb uned unee unen uner uni- unie unii unin unio unir unit unne unni unno unon unro untb unte unto unut uone uor- uore urbe urbi urde urdu ure- ured uret urib urie urin uriu urne urni uro- uroo urre urri urte urun urur urut uter utid utin utne utor utri utti utto uttu uuen uuni uuno uuri uuuu