-er c-- ccc cce ccr ccs cct ccu ccx ce- cec cee cer ces cet ceu cex crc cre crr crs crt cru crx csc cse csr css cst csu csx ctc cte ctr cts ctt ctu ctx cuc cue cur cus cut cuu cxc cxr cxs cxt cxx ec- ecc ece ecr ecs ect ecu ecx eec eee eer ees eet eex erc ere err ers ert eru es- esc ese esr ess est esu esx etc ete etr ets ett etu etx eu- euc eue eur eus eut eux ex- exc exe exr exs ext exu exx rcc rce rcr rcs rct rcu rcx re- rec ree rer res ret reu rex rrc rrr rrs rrt rru rsc rse rsr rss rst rsu rsx rtc rte rtr rts rtt rtu rtx ruc rue rur rus rut ruu rux rxr rxs scc sce scr scs sct scu scx se- sec see ser ses set seu sex sr- src sre srr srs srt srx ss- ssc sse ssr sss sst ssu ssx stc ste str sts stt stu stx suc sue sur sus sut suu sux sxc sxs sxt sxu t-x tcc tce tcr tcs tct tcu tcx te- tec tee ter tes tet teu tex trc tre trr trs trt tru trx tsc tse tsr tss tst tsu tsx ttc tte ttr tts ttt ttu ttx tuc tue tur tus tut tuu tux txe txs txt txu ucc uce ucr ucs uct ucu uec uee uer ues uet ur- urc ure urr urs urt uru urx usc use usr uss ust usu usx utc ute utr uts utt utu utx uuc uue uur uus uut uuu uxc uxr uxt uxu xcr xcx xee xer xes xet xeu xex xrc xrt xrx xsc xss xst xtc xtr xts xtx xue xus xxx

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 ceux cexe crcc crce crcr cre- crec cree cres cret creu crex crrt crss crst crtc crts crue crus crut crux cscc csce cscr cscs csec csee cser cset csrc csrs csse cssr cstc cstr csts cstx csur csus csxt ctec ctrc ctrs ctsc ctss ctsu ctts cucc cuce cuer cues cure curr curs curt cuss cust cusu cut- cutc cute cuts cutt cxxx 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 eext er-x 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 etux euer eur- eurc eure eurt euse exec exer exes exrx exte extr exts 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 reux rexx rrrr rscc rscs rsee rsre rsts rstu rtcc rtce rtee rtes rtex rtss rtts ruce ruct ruer rues ruet rurc rure rurs ruru ruse russ rust rusu rute ruts rutt rutu rxes 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 se-x sec- secc sece secr secs sect secu seec seer sees seet seeu seex serc sere serr sers sert seru sesc sese sess sest set- setc sete sets sett setx seur seux sex- sexe sext srcc srct srec sres srtr sscc ssce sscs ssec ssee sses sset ssex ssrc ssrs sssc ssss sstc ssts stcc stcs stcu stec stee ster stes stet stex strc stre strs stru stss sttc sttr stuc stue stur stus stut stux suc- succ sucr sucs suee suer sues suet sueu sur- surc sure surr surs surt suru sus- suse suss sust susu sute sutu suus sux- suxe suxt 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 tetx teut text trcc tre- trec tree tres tret treu trex trst trtc trte trtr truc true trus trut truu trux 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 tuxs txtr uces ucrc ucsc ucst ucsu ucut uers uess uext ure- ures uret urex 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 uxue uxus xces xeer xer- xers xert xeus xexe xtsr xurs xuxu xxxx

-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 creux crres cruce cruet cruex 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 cutex 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 essex essse essue estce estee ester estes estet estre estur estus esure etest etete etext etree etres etter ettes eturu eucre eurex eurre eurus euser excsc excur execs exect execx exert exsec exter extre extts extue exust exute 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 retex retsu rette retts reuer reuet reuse reuss reute rexer rexes rsust rtext rucer ruere ruers ruete rurec rusce ruses russe ruste rusts rustu