pppp ppps pprc ppru ppss ppts pptt ppur prbc prbs prcc prcp prcs pre- preb prec pree prep pres pret preu pro- prob proc proe proj proo prop pros prot prou prps prrs prsc prse prso prss prtc prtp prtr prue prus prut pruu psbr psbt psco pscu pseb psec psoc psos psou pspp pspr psps psrp pssc psse psso psst psts pstu ptcc pter ptop pttc ptuj pu-e pube pubs pubu puce pueo puer puet pueu pujo puju pupe pups pupu pur- purb pure puro purp purr purs puru puss pust put- pute puto puts putt putu puuc rbbb rbbr rbbs rbpj rbsp rbss rbst rcbc rcbo rccb rccc rccs rcep rcet rcos rcpo rcps rcpt rcsc rcss rctc rcts rebb rebe rebo rebs rebu recc rece recp recr recs rect recu reeb reep rees reet reop reos reot reou repe repo repp repr reps rept repu rere rero rers rert reru rese reso resp ress rest rete reto retr rets rett reue reup reus reut reuu rob- robb robe robo robs robt robu rocc roce roco rocs roer roes roet roje rojo rojs roob roop roor roos root rope ropo rops rorc rore roro rort roru rosc rose roso rosp ross rost rotc rote rotj roto rotr rots rott roub roue roup rous rout rpcs rpet rpob rpoe rpos rpps rpts rrrr rrsp rscc rscs rsee rsos rspb rspo rsps rsre rstp rsts rstu rtcc rtce rtee rtes rtps rtss rttp rtts rubb rube rubp rubs rubu ruce ruct ruer rues ruet rupe rupp rupt rurc rure ruro rurp rurs ruru ruse ruso russ rust rusu rute ruto ruts rutt rutu s-os sbbs sbcc sbcs sbct sber sbor sbot sbse sbsp sbst sbtc sbus sccc scce sccp sccs scct scec scee scep scer scet scob scoo scop scor scot scpb scpe scpo scps scpt scr- scrc scre scrs scsc scso scsr scst scsu sctc scto sctr scts scub scup scur scut se-c se-e se-o se-s se-t se-u sebe sebo sebs sebt sec- secc sece seco secr secs sect secu seeb seec seep seer sees seet seeu sejo seoc seop sepe sepo sepp sepr seps sept sepu serb serc sere serj sero serp serr sers sert seru sesc sese seso sess sest set- setc sete seto sets sett seur sjcc sjcs sjoe sjrt sjsu sjur sobe sobo sobp sobr sobs sobt sobu soce soco socr socs soec soeo soep soes soje soju soop soor soos soot sope sopo sopp sops sopu sorb sore soro sorr sors sort soru sose soso soss sost sotc sote soto sotp sots sotu soue soup sour sous sout spcc spco spcs speb spec spee sper spes spet spoc spoj spoo spop spor spos spot spps spro sprs spse spso spsp spss spst sptb sptc spto sptr spts spue spur spus sput srbc srcc srct sreb srec sreo sres sros srpc srps srpt srsp srtp srtr srub ssbr sscc ssce sscp sscs ssec ssee ssep sses sset ssoc ssop ssot sspc sspe sspo ssps sspt ssrc ssrs sssb sssc ssss sstb sstc sstp ssts stbc stbs stcc stcp stcs stcu stec stee steo step ster stes stet stob stoe stoo stop stor stos stot stou stpp stps strc stre stro strs stru stss sttc sttr stub stuc stue stup stur stus stut sub- subb subj subo subs suc- succ sucr sucs suee suer sues suet sueu suor suos sup- supe supo supp supr sups supt sur- surc sure suro surp surr surs surt suru sus- suse suso susp suss sust susu sute suto sutu suus tbbs tbcb tbcc tbce tbrb tbsp tbst tbtp tcbs tccc tccu tcep tcos tcpo tctc tcts tebo tebu teco tecr tecs tect teec teej teer tees teet tejo teju teor teos tepe tepp tepu ter- terc tere terj tero terp terr ters teru tesc tese teso tesp tess test tete teto tetr tets tett tetu teut tjsj tobe tobo tobs tobt tobu toce toco toee toer toes toet tojo toor toos toot top- tope topo topp tops topt topu torc tore toro torp torr tors tort toru tosb tosc tose toso toss tost tosu totc tote toto totr tots tott toup tour tous tout tpcp tpcs tper tppp tppr tprs tpsc tpte tptp tptr tput trcc tre- trec tree treo tres tret treu troc troe troo trop tros trot trou trpc trpe trpp trps trst trtc trte trtr trub truc true trus trut truu tsbc tscc tscp tsec tses tset tsob tsop tsos tsou tspo tsps tspt tsse tssr tsst tstc tsts tsup ttbb ttcp tteo tter ttoe ttop ttss tttt tubb tube tubo tubr tubs tubu tucc tuco tuer tues tuet tuor tuos tupe tupo tups tupu turb turc ture turo turp turr turs turt turu tusc tuss tust tute tuto tuts tutt tutu tuuo u-rp ubbe ubbo uber ubet uboc ubos ubpc ucbc uccp uces ucos ucpb ucrc ucsb ucsc ucsj ucst ucsu ucut uers uess ujpo uocc uor- uore upbe upcs upor upos uppc uppe uppp uppu upsc upse upto upup urbe urbs ure- ures uret uro- uroo urpo urre urse urso urss ursu urte urts urup urur urus urut usbc usbe usbr usbs uscc usce usco uscs usee user uses uset usjc usoc usoe usos uspc uspo uspp usps ussb ussc usse ussr usss usst ussu ustb ustc uste usto ustp usts usus utec utep uter utes utor utsc utto uttu uucp uuoc uuuu

-tree bbbee bbser bbsrc bbuss bcbst bccup bcers bcups be-er be-ro beber bebes bebop bebot becco becej becue becut beebe beebs beeps beers beest beete beets beeut bejou bejte beost beote beour bepop beppe beppo beppu berbe bercu berec beres beret berob beroe beror berre berru berse berte berto berts berus besee beset besob besos besot besse besso beste bests besut betee beter betes betoo betor betou betre betrs betso bett- bette betto betts betus beuer beure beust beute bo-bo bobet boboc bobos bobr bobre bobst bobts bobup bocce boces bocet bocor bocus boece boeps boero boers boese boets boeur bojer boobs