-er c-- ccc cce ccr ccs cct ccu ce- cec cee cer ces cet ceu crc cre crr crs crt cru csc cse csr css cst csu ctc cte ctr cts ctt ctu cuc cue cur cus cut cuu ec- ecc ece ecr ecs ect ecu eec eee eer ees eet erc ere err ers ert eru es- esc ese esr ess est esu etc ete etr ets ett etu eu- euc eue eur eus eut rcc rce rcr rcs rct rcu re- rec ree rer res ret reu rrc rrr rrs rrt rru rsc rse rsr rss rst rsu rtc rte rtr rts rtt rtu ruc rue rur rus rut ruu scc sce scr scs sct scu se- sec see ser ses set seu sr- src sre srr srs srt ss- ssc sse ssr sss sst ssu stc ste str sts stt stu suc sue sur sus sut suu tcc tce tcr tcs tct tcu te- tec tee ter tes tet teu trc tre trr trs trt tru tsc tse tsr tss tst tsu ttc tte ttr tts ttt ttu tuc tue tur tus tut tuu ucc uce ucr ucs uct ucu uec uee uer ues uet ur- urc ure urr urs urt uru usc use usr uss ust usu utc ute utr uts utt utu uuc uue uur uus uut uuu

cccc cccs cccu ccee ccrc ccre ccrs ccrt ccss ccst cctc cctt ccuc ccus ccut cec- cece cecs cect ceec cees cer- cerc cere cers cert cesc cese cesr cess cest cet- cete cets crcc crce crcr cre- crec cree cres cret creu crrt crss crst crtc crts crue crus crut cscc csce cscr cscs csec csee cser cset csrc csrs csse cssr cstc cstr csts csur csus ctec ctrc ctrs ctsc ctss ctsu ctts cucc cuce cuer cues cure curr curs curt cuss cust cusu cut- cutc cute cuts cutt eccc ecce ecct eces ecrc ecrr ecru ecsc ecse ecss ecsu ect- ectc ects ecus eecs eeee eees eerc eers eese eetc eete eets eetu ercc erce erec erer eres eret errc erre errs erse erst erts ertu eruc erur erus esce escr escs escu esee eser eses eset esse esst essu estc este estr ests esus etcc etcs etec etee eter etes etre etsu ette ettu euer eur- eurc eure eurt euse rccc rccs rcet rcsc rcss rctc rcts recc rece recr recs rect recu rees reet rere rers rert reru rese ress rest rete retr rets rett reue reus reut reuu rrrr rscc rscs rsee rsre rsts rstu rtcc rtce rtee rtes rtss rtts ruce ruct ruer rues ruet rurc rure rurs ruru ruse russ rust rusu rute ruts rutt rutu sccc scce sccs scct scec scee scer scet scr- scrc scre scrs scsc scsr scst scsu sctc sctr scts scur scut se-c se-e se-s se-t se-u sec- secc sece secr secs sect secu seec seer sees seet seeu serc sere serr sers sert seru sesc sese sess sest set- setc sete sets sett seur srcc srct srec sres srtr sscc ssce sscs ssec ssee sses sset ssrc ssrs sssc ssss sstc ssts stcc stcs stcu stec stee ster stes stet strc stre strs stru stss sttc sttr stuc stue stur stus stut suc- succ sucr sucs suee suer sues suet sueu sur- surc sure surr surs surt suru sus- suse suss sust susu sute sutu suus tccc tccu tctc tcts tecr tecs tect teec teer tees teet ter- terc tere terr ters teru tesc tese tess test tete tetr tets tett tetu teut trcc tre- trec tree tres tret treu trst trtc trte trtr truc true trus trut truu tscc tsec tses tset tsse tssr tsst tstc tsts tter ttss tttt tucc tuer tues tuet turc ture turr turs turt turu tusc tuss tust tute tuts tutt tutu uces ucrc ucsc ucst ucsu ucut uers uess ure- ures uret urre urse urss ursu urte urts urur urus urut uscc usce uscs usee user uses uset ussc usse ussr usss usst ussu ustc uste usts usus utec uter utes utsc uttu uuuu

-tree c-tec ccccc ccett ceere ceese cerc- cerce cercs cerec cerer ceres ceret cerre cerrs cerse cerss certe certs cerus cesce cescr cesse ceste cests cetes cette cetus crece creer crees cresc crese cress crest crete cretu creu- creue crres cruce cruet crure cruse crust cruts csere cstcc ctree cttee cuers curce curer cures curet curre currs curse curst curts cusec cuser cusse custe cutcu cutee cuter cutes cutts ecrus ecser eeeee erecs erect erere erest erets erres errtu erses erste ersts erte erter ertes eruct eruts esces escrt esect esere esser esses essse essue estce estee ester estes estet estre estur estus esure etest etete etree etres etter ettes eturu eucre eurre eurus euser recce recet rect- recte rects recue recur recus recut reece reecs reere reese reest rere- reree reres reret resee reses reset resse reste restr rests resue resus retee reter retes retsu rette retts reuer reuet reuse reuss reute rsust rucer ruere ruers ruete rurec rusce ruses russe ruste rusts rustu ruter rutte ruutu s-tec scere scert screc scree scrue scrus scter sctrs scuet scure scurr scurt scuse scut- scute scuts scutt secre secte sects secur secus seece seere seers seese seest seesu seete serce serec serer seres seret serre serse serss sert- serte serts serue serut sesce seser seses sesse seste sestu sesue setec setee seter setse sette setts settu setus setut seuer seure seuss seute sssss steer stees steet sterc stere sterr sters stert stesu stete stets steur stree stret streu strrs struc strue strut stuer sture sturt stuse stuss stute stuue sucr- sucre sucst suere suers suess suest suete suets sueur surer sures surre surte surtr surur surus suser suses susse susus sutee suter sutes sutte suttu teers teese teest teets terce teres teret tereu terre terrs terse tert- tesse teste tests teter tetes tetr- tetsu tette teuts treer trees treet trere tres- trese tress trest trete trets trett treus treut trsce truce truer trues