-er -ol c-- ccc cce ccf ccg ccl cco ccr ccs ce- cec cee cef ceg cel ceo cer ces cfc cfe cff cfg cfl cfo cfr cfs cgc cge cgg cgl cgo cgr cgs cl- clc cle clf clg cll clo clr cls co- coc coe cof cog col coo cor cos crc cre crf crg crl cro crr crs csc cse csf csg csl cso csr css ec- ecc ece ecf ecg ecl eco ecr ecs eec eee eef eeg eel eeo eer ees ef- efc efe eff efg efl efo efr efs egc ege egf egg egl ego egr egs elc ele elf elg ell elo elr els eo- eoc eoe eof eog eol eoo eor eos erc ere erf erg erl ero err ers es- esc ese esf esg esl eso esr ess fcc fce fcf fcg fcl fco fcr fcs fec fee fef feg fel feo fer fes ffc ffe fff ffg ffl ffo ffr ffs fgc fge fgf fgg fgl fgr fgs flc fle flf flg fll flo flr fls foc foe fof fog fol foo for fos frc fre frf frg frl fro frr frs fsc fse fsf fsg fsl fso fsr fss gcc gce gcf gcg gcl gco gcr gcs ge- gec gee gef geg gel geo ger ges gfc gfe gff gfl gfo gfr gfs ggc ggg ggo ggr ggs glc gle glf glg gll glo glr gls goc goe gof gog gol goo gor gos grc gre grf grg grl gro grr grs gsc gse gsf gsg gsl gso gsr gss lcc lce lcf lcg lcl lco lcr lcs lec lee lef leg lel leo ler les lfc lfe lff lfg lfl lfo lfr lfs lgc lge lgf lgg lgl lgo lgr lgs llc lle llf llg lll llo llr lls loc loe lof log lol loo lor los lrc lrf lrg lro lrr lrs lsc lse lsf lsg lsl lso lsr lss oc- occ ocf ocg ocl oco ocr ocs oec oee oef oeg oel oeo oer oes of- ofc ofe off ofg ofl ofo ofr ofs ogc oge ogf ogg ogl ogo ogs olc ole olf olg oll olo ols oo- ooc oof oog ool ooo oor oos or- orc ore orf org orl oro orr ors os- osc ose osf osg osl oso osr oss rcc rce rcf rcg rcl rco rcr rcs re- rec ree ref reg rel reo rer res rfc rfe rff rfg rfl rfo rfr rfs rgc rge rgf rgg rgo rgr rgs rlc rle rlf rlg rll rlo rlr rls roc roe rof rog rol roo ror ros rrc rrf rrg rrl rrr rrs rsc rse rsf rsg rsl rso rsr rss scc sce scf scg scl sco scr scs se- sec see sef seg sel seo ser ses sfc sfe sff sfg sfl sfo sfr sfs sgc sge sgf sgg sgl sgo sgr sgs slc sle slf slg sll slo slr sls soc soe sof sog sol soo sor sos sr- src sre srf srg srl sro srr srs ss- ssc sse ssf ssg ssl sso ssr sss