-er c-- ccc cce ccg ccr ccs cct ccu ce- cec cee ceg cer ces cet ceu cgc cge cgg cgr cgs cgt cgu crc cre crg crr crs crt cru csc cse csg csr css cst csu ctc cte ctg ctr cts ctt ctu cuc cue cug cur cus cut cuu ec- ecc ece ecg ecr ecs ect ecu eec eee eeg eer ees eet egc ege egg egr egs egt egu erc ere erg err ers ert eru es- esc ese esg esr ess est esu etc ete etg etr ets ett etu eu- euc eue eug eur eus eut gcc gce gcg gcr gcs gct gcu ge- gec gee geg ger ges get geu ggc ggg ggr ggs ggt ggu grc gre grg grr grs grt gru gsc gse gsg gsr gss gst gsu gtc gte gtg gtr gts gtt gtu gu- guc gue gug gur gus gut guu rcc rce rcg rcr rcs rct rcu re- rec ree reg rer res ret reu rgc rge rgg rgr rgs rgt rrc rrg rrr rrs rrt rru rsc rse rsg rsr rss rst rsu rtc rte rtg rtr rts rtt rtu ruc rue rug rur rus rut ruu scc sce scg scr scs sct scu se- sec see seg ser ses set seu sgc sge sgg sgr sgs sgt sgu sr- src sre srg srr srs srt ss- ssc sse ssg ssr sss sst ssu stc ste stg str sts stt stu suc sue sug sur sus sut suu tcc tce tcg tcr tcs tct tcu te- tec tee teg ter tes tet teu tgc tge tgg tgr tgs tgt tgu trc tre trg trr trs trt tru tsc tse tsg tsr tss tst tsu ttc tte ttg ttr tts ttt ttu tuc tue tug tur tus tut tuu ucc uce ucg ucr ucs uct ucu uec uee ueg uer ues uet ugc uge ugg ugr ugs ugt ugu ur- urc ure urg urr urs urt uru usc use usg usr uss ust usu utc ute utr uts utt utu uuc uue uug uur uus uut uuu

cccc cccs cccu ccee ccgc ccgs ccgt ccrc ccre ccrg ccrs ccrt ccsg ccss ccst cctc cctt ccuc ccus ccut cec- cece cecs cect ceec cees cege cer- cerc cere cers cert cesc cese cesg cesr cess cest cet- cete cets cgcc cgcg cger cges cggs cgss cgst cgtu crcc crce crcr cre- crec cree creg cres cret creu crgs crrt crss crst crtc crts crue crug crus crut cscc csce cscr cscs csec csee cser cset csrc csrs csse cssr cstc cstg cstr csts csur csus ctec ctge ctgu ctrc ctrs ctsc ctss ctsu ctts cucc cuce cuer cues cure curr curs curt cusg cuss cust cusu cut- cutc cute cuts cutt eccc ecce ecct eces ecgs ecrc ecrr ecru ecsc ecse ecss ecsu ect- ectc ects ecus eecs eeee eees eegs eerc eerg eers eese eetc eete eets eetu egcc egcg egcr egec egee eger egge eggs egre egsc egss egte egts ercc erce erec erer eres eret erg- ergg ergs errc erre errs erse erst erts ertu eruc erur erus esce escr escs escu esee eser eses eset esse essg esst essu estc este estr ests esus etcc etcs etec etee eter etes etre etsu ette ettu euer euge eur- eurc eure eurt euse gc-c gccc gccs gcet gcrg gcse gcss gcst gcsu gctc gcts gece geer gees geet gege gegg gere gers gert geru gesg gess gest gesu gete getg gets gett geue gggg ggss grcc grce grec gree greg gres gret greu grrr grrs grss grtc grue grug grur grus grut gsse gstr gsur gtcr gtcs guer gues guge gugg gugu gure gurg gurr gurs gurt guru guse guss gust gute guts gutt gutu guus rccc rccs rcet rcgc rcrg rcsc rcss rctc rctg rcts recc rece recr recs rect recu rees reet rege regr regs regt regu rere rerg rers rert reru rese ress rest rete retr rets rett reue reus reut reuu rgtr rgts rrrr rscc rscs rsee rsgc rsre rsts rstu rtcc rtce rtcg rtee rtes rtgs rtss rtts ruce ruct ruer rues ruet ruge rugg rugs rurc rure rurs ruru ruse russ rust rusu rute ruts rutt rutu sccc scce sccs scct scec scee sceg scer scet scgs scr- scrc scre scrs scsc scsr scst scsu sctc sctr scts scug scur scut se-c se-e se-g se-s se-t se-u sec- secc sece secg secr secs sect secu seec seeg seer sees seet seeu sege segg segs segu serc sere serg serr sers sert seru sesc sese sess sest set- setc sete sets sett seur sgce sgcg sger sges sggg sggs sgss sgts srcc srct srec sres srtr sscc ssce sscs ssec ssee sses sset ssgs ssgt ssrc ssrg ssrs sssc ssss sstc ssts stcc stcs stcu stec stee steg ster stes stet stge stgr strc stre strs stru stss sttc sttr stuc stue stug stur stus stut suc- succ sucr sucs suee suer sues suet sueu sug- suge sugg sur- surc sure surg surr surs surt suru sus- suse suss sust susu sute sutu suus tccc tccu tctc tcts tecr tecs tect teec teer tees teet tegg tegs tegt tegu ter- terc tere terr ters teru tesc tese tess test tete tetr tets tett tetu teut tgcc tgtc tgts trcc tre- trec tree treg tres tret treu trge trst trtc trte trtr truc true trug trus trut truu tscc tscg tsec tses tset tsgt tsse tssg tssr tsst tstc tsts tter ttss tttt tucc tuer tues tuet tugg tugs tugu turc ture turg turr turs turt turu tusc tuss tust tute tuts tutt tutu uces ucrc ucsc ucst ucsu ucut uers uess ugcc ugcg uggs uggt ugur uguu ure- ures uret urge urgu urre urse urss ursu urte urts urur urus urut uscc usce uscg uscs usee user uses uset ussc usse ussr usss usst ussu ustc uste usts usus utec uter utes utsc uttu utug uuuu

-tree c-tec ccccc ccett ceere ceese