-er -ic c-- ccc cce ccf ccg cci cco ccr ccs cct ce- cec cee cef ceg cei ceo cer ces cet cfc cfe cff cfg cfi cfo cfr cfs cft cgc cge cgg cgi cgo cgr cgs cgt ci- cic cie cif cig cii cio cir cis cit co- coc coe cof cog coi coo cor cos cot crc cre crf crg cri cro crr crs crt csc cse csf csg csi cso csr css cst ctc cte ctf ctg cti cto ctr cts ctt ec- ecc ece ecf ecg eci eco ecr ecs ect eec eee eef eeg eeo eer ees eet ef- efc efe eff efg efi efo efr efs eft egc ege egf egg egi ego egr egs egt eic eie eif eig eii eio eir eis eit eo- eoc eoe eof eog eoi eoo eor eos eot erc ere erf erg eri ero err ers ert es- esc ese esf esg esi eso esr ess est etc ete etf etg eti eto etr ets ett fcc fce fcf fcg fci fco fcr fcs fct fec fee fef feg fei feo fer fes fet ffc ffe fff ffg ffi ffo ffr ffs fft fgc fge fgf fgg fgi fgr fgs fgt fic fie fif fig fii fir fis fit foc foe fof fog foi foo for fos fot frc fre frf frg fri fro frr frs frt fsc fse fsf fsg fsi fso fsr fss fst ftc fte ftf ftg fti fto ftr fts ftt gcc gce gcf gcg gci gco gcr gcs gct ge- gec gee gef geg gei geo ger ges get gfc gfe gff gfi gfo gfr gfs gft ggc ggg ggi ggo ggr ggs ggt gic gie gif gig gii gio gir gis git goc goe gof gog goi goo gor gos got grc gre grf grg gri gro grr grs grt gsc gse gsf gsg gsi gso gsr gss gst gtc gte gtf gtg gti gto gtr gts gtt i-f icc ice icf icg ici ico icr ics ict ie- iec iee ief ieg iei ier ies iet ifc ife iff ifg ifi ifo ifr ifs ift igc ige igf igg igi igo igr igs igt iic iie iif iii iio iir iis iit io- ioc ioe iof iog ioi ioo ior ios iot ir- irc ire irf irg iri iro irr irs irt is- isc ise isf isg isi iso isr iss ist itc ite itf itg iti ito its itt o-i oc- occ ocf ocg oci oco ocr ocs oct oec oee oef oeg oei oeo oer oes oet of- ofc ofe off ofg ofi ofo ofr ofs oft ogc oge ogf ogg ogi ogo ogs ogt oic oie oif oii oio oir ois oit oo- ooc oof oog ooi ooo oor oos oot or- orc ore orf org ori oro orr ors ort os- osc ose osf osg osi oso osr oss ost ot- otc ote otf otg oti oto otr ots ott rcc rce rcf rcg rci rco rcr rcs rct re- rec ree ref reg rei reo rer res ret rfc rfe rff rfg rfi rfo rfr rfs rft rgc rge rgf rgg rgi rgo rgr rgs rgt ric rie rif rig rii rio rir ris rit roc roe rof rog roi roo ror ros rot rrc rrf rrg rri rrr rrs rrt rsc rse rsf rsg rsi rso rsr rss rst rtc rte rtf rtg rti rto rtr rts rtt scc sce scf scg sci sco scr scs sct se- sec see sef seg sei seo ser ses set sfc sfe sff sfg sfi sfo sfr sfs sft sgc sge sgf sgg sgi sgo sgr sgs sgt sic sie sif sig sii sio sir sis sit soc soe sof sog soi soo sor sos sot sr- src sre srf srg sri sro srr srs srt ss- ssc sse ssf ssg ssi sso ssr sss sst stc ste stf stg sti sto str sts stt tcc tce tcf tcg tci tco tcr tcs tct te- tec tee tef teg tei teo ter tes tet tfc tfe tff tfg tfi tfo tfr tfs tft tgc tge tgf tgg tgi tgo tgr tgs tgt tic tie tif tig tii tio tir tis tit to- toc toe tof tog toi too tor tos tot trc tre trf trg tri tro trr trs trt tsc tse tsf tsg tsi tso tsr tss tst ttc tte ttf ttg tti tto ttr tts ttt