-er c-- ccc cce ccf cco ccr cct ce- cec cee cef ceo cer cet cfc cfe cff cfo cfr cft co- coc coe cof coo cor cot crc cre crf cro crr crt ctc cte ctf cto ctr ctt ec- ecc ece ecf eco ecr ect eec eee eef eeo eer eet ef- efc efe eff efo efr eft eo- eoc eoe eof eoo eor eot erc ere erf ero err ert etc ete etf eto etr ett fcc fce fcf fco fcr fct fec fee fef feo fer fet ffc ffe fff ffo ffr fft foc foe fof foo for fot frc fre frf fro frr frt ftc fte ftf fto ftr ftt oc- occ ocf oco ocr oct oec oee oef oeo oer oet of- ofc ofe off ofo ofr oft oo- ooc oof ooo oor oot or- orc ore orf oro orr ort ot- otc ote otf oto otr ott rcc rce rcf rco rcr rct re- rec ree ref reo rer ret rfc rfe rff rfo rfr rft roc roe rof roo ror rot rrc rrf rrr rrt rtc rte rtf rto rtr rtt tcc tce tcf tco tcr tct te- tec tee tef teo ter tet tfc tfe tff tfo tfr tft to- toc toe tof too tor tot trc tre trf tro trr trt ttc tte ttf tto ttr ttt

cccc cccf ccee ccfc ccff ccoc ccrc ccre ccrf ccrt cctc cctt cec- cece ceco cect ceec cef- cefc ceor cer- cerc cere cerf cero cert cet- cete ceto cfcf cfco cffr cfor cfre cfrt cftc cfte cftr coce coco coct cofc cofe coff coft coof coot cor- corc core corf coro corr cort cotc cote coto cott crcc crce crcr cre- crec cree creo cret crfc croc croe croo cror crot crrt crtc crtf ctcf ctec ctfc ctfo ctor ctot ctrc eccc ecce ecco ecct ecef ecfc ecfr eco- ecot ecrc ecrf ecrr ect- ectc ectf ecto eeee eefe eeoc eerc eero eetc eete efco efeo efet efor eft- eore eotc eoto ercc erce erec erer eret erfc erft eroc eroe eroo errc erre erro etcc etco etec etee eter etfc etfe etoe etre etro ette etto fccf fcot fcto fece fect feer feet fefc fefe feff fefo feof ferc fere fero ferr fert fete fetr fett ffcc ffee ffff ffrr fftf foce foco foer fofo foof foot for- fore foro forr fort fote foto fott frcc free freo fret frfc froe frot ft-c fter ftfc o-eo occc occt oce ocee ocef ocet ocre ocro ocrr oct- octe octo oec- oecc oeec oere ofcr ofer off- offc offe offo offr ofor ofre oocr ooer ooff oooo oore oort orce orco ore- orec oreo orer orfe orff oro- oroe orof oror orot orro ortc orte orto otee oter otfc oto- otoe otof otoo otor otre otro otte otto rccc rcet rcfc rctc recc rece recr rect reef reet refe reff refr reft reof reot rere rero rert rete reto retr rett rfef rffc rftc rocc roce roco roer roet rofc rofe roff rofo roof roor root rorc rore roro rort rotc rote roto rotr rott rrfc rrrr rtcc rtce rtee rtfc tccc tcfc tctc teco tecr tect teec teef teer teet tefc teff teft teor ter- terc tere terf tero terr tete teto tetr tett tfec tfot tftc toce toco toee toer toet toff tofo toft toof toor toot torc tore torf toro torr tort totc tote toto totr tott trcc tre- trec tree tref treo tret trfc trfr troc troe troo trot trtc trte trtr tteo tter ttfc ttff ttoe tttt

-tree c-cor c-tec ccccc ccett ceco- ceere cefor ceoce ceoor cerc- cerce cerco cerec cerer ceret cero- ceroc cerre cerro certe ceto- cette co-co cocc- cocce cocco coceo cocto coete cofer coffe cofre cooee cooer coore coote corce core- coree corer corfe corfo coro- corot corre corte corto coter cott- cotte cotto crece creer creft creo- creot crete croce croco croft crooe croot crore crote crott ctree cttee ecoff ectfe ecto- ector ectot eeeee efere efetf effer effet efore efter eofor eorre erect erere eroor erore eroto error erte erter etete etoro etree etter feeor feere fefor feoff ferce feret ferr- ferre ferro ferte feter feto- fetor fette focer foore foote force fore- foreo foret forro forte forto fotte freer freet frere frett froot frore frote ftrtt o-fer ocftc ocoee ocote ocree octet octo- octor oeco- offer offof offre offto ofoto ofter oo-er oocre ooooo orcet oreco oreo- orere orero orfeo orfoe orfor oroco oroer orret orter ortet ortoo otere otero otoce ototo otter r-co- recce recco recet rect- recte recto reece reefe reeft reere refco refer refet reffe reffo rere- reree reret retee reter retro rette retto ro-ro rocco rocor roero roffe rofor rooer roofe rooft roore roote rorer roter roto- rotor rotot rotte rotto tefe teoco terce terco teret teror terre terro tert- teter tetr- tetro tette tocco toco- toece toeof toerr toeto tofet toffo tofor tofte toore torce toreo toret torre torro torte torto toter toto- totoe totoo totte treco treer treet trefe treff trere trete trett troco troee trofe troff troft trott ttttt

ceecee cerco- cerete cerote certco cetore cocco- cococo cocto- coerce cofere cofete coffee coffer coffre coo-er coocoo coofer cooter corect corteo cortot cotote cotter crecco creete creote crocco crocer croote ecotec ectro- eerect efecte effect effere effete effoff effore effort efreet efter- eototo eroto- errett etcetc etoeot ettore feeror feetof feofor ferfer feroce ferrer ferret ferro- fertee ferter fetter foerre foeto- foetor foofoo footer forcer forcet forrec forrer forrot fortee forter freeof freeto frefre frette froofe fterer fterre ocreo- octett octree oerter oferre offeet oftfor oofotr oooooo otocec ottoor r-tree re-foc recoct recore recreo recto- rector reefer reeffe refect refeet refeff refert refete refoot refret refter reroof reroot retece reteer reteet reteoo retere retore retort retree retret retro- retrot retter rococo rocoto roofer rooter rootof rootte rorter rotter t-tree tecto- tector teeoff teetee teeter tercer tercet terete terreo terrer terret terror terrot terter tertre