rocc roce rock roco rocs roer roes roet roke rokk roko rokr roks roku rook roop roor roos root rope ropo rops rorc rore rork roro rort roru rosc rose roso rosp ross rost rotc rote rotk roto rotr rots rott roue rouk roup rous rout rpcs rpet rpoe rpos rpps rpts rrrr rrsp rscc rscs rsee rsos rspk rspo rsps rsre rstp rsts rstu rtcc rtce rtee rtes rtps rtss rttp rtts ruce ruck ruct ruer rues ruet ruke rukk ruku ruok rupe rupp rupt rurc rure ruro rurp rurs ruru ruse rusk ruso russ rust rusu rute ruto ruts rutt rutu s-os sccc scce sccp sccs scct scec scee scep scer scet sck- scok scoo scop scor scot scpe scpo scps scpt scr- scrc scre scrs scsc scso scsr scst scsu sctc scto sctr scts scup scur scut se-c se-e se-k se-o se-s se-t se-u sec- secc sece seck seco secr secs sect secu seec seek seep seer sees seet seeu seke sekk seko sekt seku seoc seok seop sepe sepo sepp sepr seps sept sepu serc sere serk sero serp serr sers sert seru sesc sese seso sess sest set- setc sete seto sets sett seur skee skeo skep sker skes sket skoe skop skor skot skpc skpo skrt skss skue skup skur skut soce sock soco socr socs soec soeo soep soes soke sokk soko soku sook soop soor soos soot sope sopo sopp sops sopu sore soro sorr sors sort soru sose soso soss sost sotc sote sotk soto sotp sots sotu soue souk soup sour sous sout spcc spco spcs spec spee spek sper spes spet spke spkr spoc spok spoo spop spor spos spot spps spro sprs spse spso spsp spss spst sptc spto sptr spts spue spur spus sput srcc srct srec sreo sres sros srpc srps srpt srsp srtp srtr sscc ssce sscp sscs ssec ssee ssep sses sset ssoc ssop ssot sspc sspe sspo ssps sspt ssrc ssrs sssc ssss sstc sstp ssts stcc stcp stcs stcu stec stee stek steo step ster stes stet stks stoe stok stoo stop stor stos stot stou stpp stps strc stre strk stro strs stru stss sttc sttr stuc stue stuk stup stur stus stut suc- succ suck sucr sucs suee suer sues suet sueu suke suks suku suor suos sup- supe supo supp supr sups supt sur- surc sure suro surp surr surs surt suru sus- suse susk suso susp suss sust susu sute suto sutu suus tccc tccu tcep tcos tcpo tctc tcts teck teco tecr tecs tect teec teek teer tees teet teke teok teor teos tepe tepp tepu ter- terc tere terk tero terp terr ters teru tesc tese teso tesp tess test tete teto tetr tets tett tetu teuk teut tkos tkts toce tock toco toee toek toer toes toet toke toko toku took toor toos toot top- tope topo topp tops topt topu torc tore tork toro torp torr tors tort toru tosc tose tosk toso toss tost tosu totc tote toto totr tots tott touk toup tour tous tout tpck tpcp tpcs tper tpke tpks tppp tppr tprs tpsc tpte tptp tptr tput trcc tre- trec tree trek treo tres tret treu troc troe troo trop tros trot trou trpc trpe trpp trps trst trtc trte trtr truc true truk trus trut truu tscc tscp tsec tses tset tsks tsop tsos tsou tspo tsps tspt tsse tssr tsst tstc tsts tsup ttcp tteo tter ttoe ttop ttss tttt tucc tuck tuco tuer tues tuet tuke tuko tuks tuor tuos tupe tupo tups tupu turc ture turk turo turp turr turs turt turu tusc tusk tuss tust tute tuto tuts tutt tutu tuuo u-rp uccp uces ucos ucrc ucsc ucst ucsu ucut uers uess ukcc ukek ukes ukeu ukko ukok ukps ukrc uksc ukup ukur uocc uoke uor- uore upcs upor upos uppc uppe uppp uppu upsc upse upto upup ure- ures uret urke uro- urok uroo urpo urre urse urso urss ursu urte urts uruk urup urur urus urut us-k uscc usce usco uscs usee user uses uset uske usoc usoe usos uspc uspo uspp usps ussc usse ussr usss usst ussu ustc uste usto ustp usts usus utec utep uter utes utor utsc utto uttu uucp uuoc uuuu

-tree c-cor c-p-c c-pop c-tec ccccc ccett ccups ceco- cecos ceere ceese ceoce ceoor ceose ceous cepes cepet cepos cepot ceppo cerc- cerce cerco cercs cerec cerer ceres ceret cerke cero- ceroc ceros cerou cerps cerre cerro cerrs cerse cerss certe certs cerus cesce cescr cesko cesse ceste cests cetes ceto- cette cetus co-co co-op cocc- cocce cocco coceo cocke cocks cockt cocos cocto cocur cocus coepe coers coest coete coeur coeus coker cokes coket cokk- cokot cooee cooer cooke cooks cookt coope coops coopt coore coors coost coote coots copce copec coper copes copos coppe coppo copps copr- copre copro copse copte copto copts copur copus coput corce core- coree corer cores coreu corke corks coro- corop corot corpe corps corre corrs corse corso corss corsu corte corto corts corus cosco cosec coser coses coset cosse cost- coste costo costs coter cotes cotos cotso cott- cotte cotto cotts cottu couco couer coupe coups coure cours court couru couse coust couto couts coutu cpctc cpesc crece creek creep creer crees creke creo- creop creos creot crepe crept crepu cresc crese creso cress crest crete cretu creu- creue creup croce crock croco crocs croes croke crokt crooe crook croop croos croot cropc crope cropo crops crore crose cross crost crote crots crott crouk croup crous crout crres cruce cruck cruet cruke cruor crupe crure cruse crust cruts csere cspot cspro csprs cstcc cteep ctree cttee cucks cucuk cuero cuers cueto cueup cuker cukes cukor cuoco cuore cuper cupes cupr- cupro curce curer cures curet curre curro currs curse curst curto curts curup cusco cusec cuser cusks cusop cusps cusse cusso custe cutco cutcu cutee cuter cutes cutro cutto cutts cutup e-cps e-pro eccup ecker ecorp ecots ecrus ecser