-er -ic c-- ccc cce ccg cci ccr ccs cct ccx ce- cec cee ceg cei cer ces cet cex cgc cge cgg cgi cgr cgs cgt ci- cic cie cig cii cir cis cit cix crc cre crg cri crr crs crt crx csc cse csg csi csr css cst csx ctc cte ctg cti ctr cts ctt ctx cxc cxi cxr cxs cxt cxx ec- ecc ece ecg eci ecr ecs ect ecx eec eee eeg eer ees eet eex egc ege egg egi egr egs egt egx eic eie eig eii eir eis eit eix erc ere erg eri err ers ert es- esc ese esg esi esr ess est esx etc ete etg eti etr ets ett etx ex- exc exe exi exr exs ext exx gcc gce gcg gci gcr gcs gct ge- gec gee geg gei ger ges get gex ggc ggg ggi ggr ggs ggt gic gie gig gii gir gis git grc gre grg gri grr grs grt grx gsc gse gsg gsi gsr gss gst gsx gtc gte gtg gti gtr gts gtt gtx gxs gxt icc ice icg ici icr ics ict ie- iec iee ieg iei ier ies iet iex igc ige igg igi igr igs igt iic iie iii iir iis iit iix ir- irc ire irg iri irr irs irt irx is- isc ise isg isi isr iss ist itc ite itg iti its itt itx ixc ixe ixi rcc rce rcg rci rcr rcs rct rcx re- rec ree reg rei rer res ret rex rgc rge rgg rgi rgr rgs rgt rgx ric rie rig rii rir ris rit rix rrc rrg rri rrr rrs rrt rsc rse rsg rsi rsr rss rst rsx rtc rte rtg rti rtr rts rtt rtx rxr rxs scc sce scg sci scr scs sct scx se- sec see seg sei ser ses set sex sgc sge sgg sgi sgr sgs sgt sgx sic sie sig sii sir sis sit six sr- src sre srg sri srr srs srt srx ss- ssc sse ssg ssi ssr sss sst ssx stc ste stg sti str sts stt stx sxc sxi sxs sxt t-x tcc tce tcg tci tcr tcs tct tcx te- tec tee teg tei ter tes tet tex tgc tge tgg tgi tgr tgs tgt tic tie tig tii tir tis tit tix trc tre trg tri trr trs trt trx tsc tse tsg tsi tsr tss tst tsx ttc tte ttg tti ttr tts ttt ttx txe txi txs txt xci xcr xcx xee xeg xer xes xet xex xge xgi xic xie xii xis xit xix xrc xrt xrx xsc xsi xss xst xtc xti xtr xts xtx xxi xxx