-er -ic c-- ccc cce ccg cci ccl ccr ccs ccx ce- cec cee ceg cei cel cer ces cex cgc cge cgg cgi cgl cgr cgs ci- cic cie cig cii cil cir cis cix cl- clc cle clg cli cll clr cls clx crc cre crg cri crl crr crs crx csc cse csg csi csl csr css csx cxc cxi cxl cxr cxs cxx ec- ecc ece ecg eci ecl ecr ecs ecx eec eee eeg eel eer ees eex egc ege egg egi egl egr egs egx eic eie eig eii eil eir eis eix elc ele elg eli ell elr els elx erc ere erg eri erl err ers es- esc ese esg esi esl esr ess esx ex- exc exe exi exl exr exs exx gcc gce gcg gci gcl gcr gcs ge- gec gee geg gei gel ger ges gex ggc ggg ggi ggr ggs gic gie gig gii gil gir gis glc gle glg gli gll glr gls glx grc gre grg gri grl grr grs grx gsc gse gsg gsi gsl gsr gss gsx gxl gxs icc ice icg ici icl icr ics ie- iec iee ieg iei iel ier ies iex igc ige igg igi igl igr igs iic iie iii iil iir iis iix il- ilc ile ilg ili ill ilr ils ilx ir- irc ire irg iri irl irr irs irx is- isc ise isg isi isl isr iss ixc ixe ixi ixl lcc lce lcg lci lcl lcr lcs lcx lec lee leg lei lel ler les lex lgc lge lgg lgi lgl lgr lgs lic lie lig lii lil lir lis lix llc lle llg lli lll llr lls lrc lrg lri lrr lrs lsc lse lsg lsi lsl lsr lss lxc lxi lxr lxx rcc rce rcg rci rcl rcr rcs rcx re- rec ree reg rei rel rer res rex rgc rge rgg rgi rgr rgs rgx ric rie rig rii ril rir ris rix rlc rle rlg rli rll rlr rls rrc rrg rri rrl rrr rrs rsc rse rsg rsi rsl rsr rss rsx rxr rxs scc sce scg sci scl scr scs scx se- sec see seg sei sel ser ses sex sgc sge sgg sgi sgl sgr sgs sgx sic sie sig sii sil sir sis six slc sle slg sli sll slr sls slx sr- src sre srg sri srl srr srs srx ss- ssc sse ssg ssi ssl ssr sss ssx sxc sxi sxl sxs xci xcl xcr xcx xee xeg xel xer xes xex xge xgi xgl xic xie xii xis xix xlg xli xlr xls xrc xrx xsc xsi xsl xss xxi xxl xxx