rebu recc rece reci recp recr rect recu reeb reel reep reet reii reil reir reit reiu relb rele rell relp relt repe repi repl repp repr rept repu rere reri rert reru rete reti retr rett reue reul reup reut reuu rib- ribe ribu ricc rice rict riel riep rier riet rieu rile rill rilp rilu ripe ripi ripl ripp ripr ript rire riri rite riti ritl ritt ritu riue rlee rleu rpet rpii rrle rrrr rtcc rtce rtee rtei rtle rtlt rttp rubb rube rubi rubp rubu ruce ruci ruct ruel ruer ruet ruit rule rull rupe rupp rupt rurc rure ruri rurp ruru rute ruti rutl rutt rutu tbcb tbcc tbce tbil tbit tbrb tbtp tccc tccu tcep tctc tcul tebu tecl tecr tect teec teel teer teet teic teie teil teip teir teiu tel- telc tele teli tell telt telu tepe tepi tepp tepu ter- terc tere teri terp terr teru tete teti tetr tett tetu teut tibi tibu ticc tice tie- tiee tiei tiel tiep tier tiet tiit tiiu tile till tilr tilt tip- tipc tipe tipi tipp tipt tipu tirb tire tiri tirl tirr tiru titc tite titi titp titt titu tlli tpcp tper tpir tppp tppr tpte tptp tptr tput trcc trcl tre- trec tree trei tret treu tri- trib tric trie tril trip trit trpc trpe trpp trtc trte trtr trub truc true trut truu ttbb ttcp tter tttt ttul tubb tube tubr tubu tucc tuei tuel tuer tuet tuil tuit tuiu tule tuli tull tulp tulu tupe tupi tupu turb turc ture turi turp turr turt turu tute tuti tutl tutt tutu u-ie u-rp ubbe ubbi uber ubet ubic ubii ubir ubit uble ubli ubpc ucbc ucci uccp ucel ucil ucpb ucrc ucut ueir uele ueli uell uepi uile uipi uirr ulbc ulcc uleb ulee ulic ulie ulle ulli ullr ulti ultt ulul upbe upci upic upie uplb uppc uppe uppp uppu upri uptl upup urbe urbi urci ure- uret urib uric urie uriu urle urre urri urte urup urur urut utec utel utep uter util utri utti uttu uucp uulu uuri uuuu