-er c-- ccc cce cco ccp ccr cct ccx ce- cec cee ceo cep cer cet cex co- coc coe coo cop cor cot cox cpc cpe cpo cpp cpr cpt cpx crc cre cro crp crr crt crx ctc cte cto ctp ctr ctt ctx cxc cxo cxp cxr cxt cxx ec- ecc ece eco ecr ect ecx eec eee eeo eep eer eet eex eo- eoc eoe eoo eop eor eot ep- epc epe epo epp epr ept epx erc ere ero erp err ert etc ete eto etp etr ett etx ex- exc exe exo exp exr ext exx oc- occ oco ocp ocr oct ocx oec oee oeo oep oer oet oex oo- ooc ooo oop oor oot oox op- opc ope opo opp opr opt opx or- orc ore oro orp orr ort orx ot- otc ote oto otp otr ott ox- oxc oxo oxt oxx p-p pcc pce pco pcp pcr pct pcx pec pee peo pep per pet pex poc poe poo pop por pot pox ppc ppe ppo ppp ppr ppt ppx prc pre pro prp prr prt prx pt- ptc pte pto ptp ptr ptt ptx pxc pxe pxr pxt rcc rce rco rcp rcr rct rcx re- rec ree reo rep rer ret rex roc roe roo rop ror rot rox rpc rpe rpo rpp rpr rpt rpx rrc rrp rrr rrt rtc rte rto rtp rtr rtt rtx rxp rxr t-x tcc tce tco tcp tcr tct tcx te- tec tee teo tep ter tet tex to- toc toe too top tor tot tox tpc tpe tpo tpp tpr tpt tpx trc tre tro trp trr trt trx ttc tte tto ttp ttr ttt ttx txe txt xcp xcr xcx xee xep xer xet xex xoc xoo xop xor xot xox xpc xpe xpo xpp xpt xrc xrt xrx xtc xtp xtr xtx xxo xxp xxx

cccc cccp ccee ccoc ccpe ccpp ccpr ccrc ccre ccrp ccrt cctc cctt cec- cece ceco cecp cect ceec ceop ceor cepc cepe cepo cepp cepr cept cer- cerc cere cero cerp cert cet- cete ceto cetp cexe coce coco cocp coct coep coex coop coot cope copo copp copr copt cor- corc core coro corp corr cort cotc cote coto cott coxe cpce cpep cper cpox cpre cprt cptp cptr crcc crce crcr cre- crec cree creo crep cret crex croc croe croo crop cror crot crpc crrt crtc crtp ctcp ctec ctep ctor ctot ctpo ctpp ctrc ctrp cxpo cxro cxxx eccc ecce ecco ecct eco- ecop ecot ecpp ecrc ecrr ect- ectc ecto eeee eeoc eerc eero eetc eete eext eore eotc eoto epcc epec epee eper epoc epor epot epox eppc eppo eppp epro eprp epte epxp er-x ercc erce ercp erec erer eret eroc eroe eroo erpe errc erre erro etcc etco etec etee eter etoe etox etre etro ette etto exco exec exer exo- exor expo expr expt exrx exte extr o-eo occc occt oce ocee ocet ocpp ocre ocro ocrr oct- octe octo oec- oecc oeec oere oocr ooer oooo oore oort ootp opec opep oper opet opex opo- opor oppo opto orce orco ore- orec oreo orer orex oro- oroe oror orot orpc orpe orro ortc orte orto otee otep oter oto- otoe otoo otor otpp otre otro otte otto oxep oxer oxo- oxox oxxo pccc pcce pcep pcer pcoe pcpp pcrc pcre pcte pece peco pecr pect peec peep peer peet peor pepe pepo per- perc pere pero perp perr pert pete peto petr pett poce poco poer poet poop poor poot pop- popc pope popo popp popt porc pore poro porr port potc pote poto pott ppcc pper pppo pppp pprc pptt prcc prcp pre- prec pree prep pret prex pro- proc proe proo prop prot prox prtc prtp prtr ptcc pter ptop ptox pttc rccc rcep rcet rcpo rcpt rctc recc rece recp recr rect reep reet reop reot repe repo repp repr rept rere rero rert rete reto retr rett rexx rocc roce roco roer roet roop roor root roox rope ropo rorc rore roro rort rotc rote roto rotr rott roxo rpet rpoe rrrr rtcc rtce rtee rtex rttp tccc tcep tcpo tctc teco tecr tect teec teer teet teor tepe tepp ter- terc tere tero terp terr tete teto tetr tett tetx text toce toco toee toer toet toor toot top- tope topo topp topt torc tore toro torp torr tort torx totc tote toto totr tott tox- toxo toxt tpcp tper tppp tppr tpte tptp tptr trcc tre- trec tree treo tret trex troc troe troo trop trot trox trpc trpe trpp trtc trte trtr ttcp tteo tter ttoe ttop tttt txtr xeer xer- xero xert xexe xoco xoro xorp xote xoxo xpcc xper xpot xpto xrep xtep xtro xxxo xxxx

-tree c-cor c-p-c c-pop c-tec ccccc ccett ceco- ceere ceoce ceoor cepet cepot ceppo cerc- cerce cerco cerec cerer ceret cero- ceroc cerre cerro certe ceto- cette co-co co-op cocc- cocce cocco coceo cocto coepe coete cooee cooer coope coopt coore coote copce copec coper coppe coppo copr- copre copro copte copto corce core- coree corer corex coro- corop corot corpe corre corte corto coter cott- cotte cotto cpctc crece creep creer creo- creop creot crepe crept crete croce croco crooe croop croot cropc crope cropo crore crote crott cteep ctree cttee e-pro ecorp ecto- ector ectot eeeee eepee eorre epcot eperc epopt epote erect erept erere eroor erore eroto error erte erter etete etext etoro etree etter excop excpt exect execx exept exert exopc exopt exore exort exper expro exptr exter extre extro ocoee ocote ocree octet octo- octor oeco- oeppo oo-er oocre ooooo opepe opere opper opter opto- optot optto orcet orcop oreco oreo- orere orero orexo oroco oroer orret orter ortet ortoo otere otero otoce ototo otpor otter oxter p-o-x p-rep pcept pcert pctct pecco peece peere peert peete pepco pepee peppe pept- pepto perce perec perer peret perot perox perre perro perte perto