-er c-- ccc ccd cce ccf cco ccr cct cdc cdd cde cdf cdo cdr cdt ce- cec ced cee cef ceo cer cet cfc cfd cfe cff cfo cfr cft co- coc cod coe cof coo cor cot crc crd cre crf cro crr crt ctc ctd cte ctf cto ctr ctt dcc dcd dce dcf dco dcr dct ddc ddd dde ddf ddo ddr ddt de- dec ded dee def deo der det dfc dfd dfe dff dfo dfr dft doc dod doe dof doo dor dot drc drd dre dro drr drt dtc dtd dte dtf dto dtr dtt ec- ecc ecd ece ecf eco ecr ect ed- edc edd ede edf edo edr edt eec eed eee eef eeo eer eet ef- efc efd efe eff efo efr eft eo- eoc eod eoe eof eoo eor eot erc erd ere erf ero err ert etc etd ete etf eto etr ett fcc fcd fce fcf fco fcr fct fdc fdd fde fdf fdo fdr fdt fec fed fee fef feo fer fet ffc ffd ffe fff ffo ffr fft foc foe fof foo for fot frc frd fre frf fro frr frt ftc ftd fte ftf fto ftr ftt oc- occ ocd ocf oco ocr oct odc odd ode odf odo odr odt oec oed oee oef oeo oer oet of- ofc ofd ofe off ofo ofr oft oo- ooc ood oof ooo oor oot or- orc ord ore orf oro orr ort ot- otc otd ote otf oto otr ott rcc rcd rce rcf rco rcr rct rdc rdd rde rdf rdo rdr rdt re- rec red ree ref reo rer ret rfc rfd rfe rff rfo rfr rft roc rod roe rof roo ror rot rrc rrd rrf rrr rrt rtc rtd rte rtf rto rtr rtt tcc tcd tce tcf tco tcr tct tdc tdd tde tdf tdo tdr tdt te- tec ted tee tef teo ter tet tfc tfd tfe tff tfo tfr tft to- toc tod toe tof too tor tot trc trd tre trf tro trr trt ttc ttd tte ttf tto ttr ttt

c-cd cccc cccf ccdc ccdf ccdr cced ccee ccfc ccfd ccff ccoc ccod ccrc ccre ccrf ccrt cctc cctt cd-e cd-r cddr cdec cdef cder cdfe cdot cdre cec- cece ceco cect cedd cede cedo cedt ceec cef- cefc ceor cer- cerc cerd cere cerf cero cert cet- cete ceto cfcf cfco cffr cfor cfre cfrt cftc cfte cftr coce coco coct codd code coed cofc cofe coff coft cood coof coot cor- corc cord core corf coro corr cort cotc cote coto cott crcc crce crcr crdc cre- crec cred cree creo cret crfc croc crod croe croo cror crot crrt crtc crtf ctcf ctec ctfc ctfo ctor ctot ctrc dccc dcct dcfc dctc dddd ddoc ddot ddrc ddre dec- decc decd dece deco dect dedd dede dedo deed deef deer deet defe deff defo deft deor der- derc dere derf dero derr dete deto detr dfcc dfco dfdt dfer dfoe dfrf dftr doce doco doct dod- dodd dode dodo doer doff dood doof door doot dorc dord dore dorf doro dorr dort dotd dote doto dott dred dree dref dret drfc drod drof drot dtcc dted dtfc dtor dtot eccc ecce ecco ecct ecdc ecdf eced ecef ecfc ecfr eco- ecod ecot ecrc ecrf ecrr ect- ectc ectf ecto eddc edde eddo ede- eder edoc edod eede eeee eefe eeoc eerc eero eetc eete efco efeo efet efor eft- eocd eode eore eotc eotd eoto ercc erce erde erdf erec ered erer eret erfc erft eroc erod eroe eroo errc erre erro etcc etco etec etee eter etfc etfe etoe etre etro ette etto fccf fcot fcto fdoc fdot fdtc fece fect fede feed feer feet fefc fefe feff fefo feod feof ferc ferd fere fero ferr fert fete fetr fett ffcc ffee ffff ffrr fftf foce foco fode foed foer fofo food foof foot for- ford fore foro forr fort fote foto fott frcc fred free freo fret frfc froe frot ft-c ftcd fter ftfc o-eo occc occt oce oced ocee ocef ocet ocre ocro ocrr oct- octe octo oddd oded odeo oder odet odoo odor odot oec- oecc oedo oeec oere ofcr ofdr ofer off- offc offe offo offr ofor ofre oocr ooer ooff oooo oord oore oort orce orco orde ordo ore- orec ored oreo orer orfe orff oro- oroe orof oror orot orro ortc orte orto otcd oted otee oter otfc oto- otoe otof otoo otor otre otro otte otto rccc rcdc rcde rcet rcfc rcrd rctc rder rdoc recc recd rece recr rect redc redd rede redo redr reed reef reet refd refe reff refr reft reod reof reot rerd rere rero rert retd rete reto retr rett rfef rffc rftc rocc roce roco rodd rode rodo roed roer roet rofc rofe roff rofo rood roof roor root rorc rore roro rort rotc rote roto rotr rott rred rrfc rrrr rtcc rtce rtdt rtee rtfc tccc tcdd tcfc tctc tdff tdor teco tecr tect tedd tede teec teed teef teer teet tefc teff teft teor ter- terc tere terf tero terr tete teto tetr tett tfdc tfec tfot tftc toce toco todd tode todo todt toed toee toer toet toff tofo toft tood toof toor toot torc tord tore torf toro torr tort totc totd tote toto totr tott trcc tre- trec tred tree tref treo tret trfc trfd trfr troc trod troe troo trot trtc trte trtr tteo tter ttfc ttff ttoe tttt

-tree c-cor c-dot c-tec ccccc ccett ceco- ceddo ceded ceder cedor cedr- cedre cedro ceede ceedo ceere cefor ceoce ceoor cerc- cerce cerco cerdo cerec cered cerer ceret cero- ceroc cerre cerro certe ceto- cette co-co co-ed cocc- cocce cocco coceo cocto codco codde codec coded coder codo coete cofer coffe cofre coode cooed cooee cooer coord coore coote corce corde core- cored coree corer corfe corfo coro- corod corot corre corte corto coted coter