-er a-a a-c a-t aaa aac aae aaf aag aan aao aar aas aat ac- aca acc ace acf acg acn aco acr acs act aea aec aee aef aeg aen aeo aer aes aet af- afa afc afe aff afg afn afo afr afs aft ag- aga agc age agf agg agn ago agr ags agt an- ana anc ane anf ang ann ano anr ans ant aoa aoc aoe aof aog aon aoo aor aos aot ar- ara arc are arf arg arn aro arr ars art as- asa asc ase asf asg asn aso asr ass ast at- ata atc ate atf atg atn ato atr ats att c-- caa cac cae caf cag can cao car cas cat cca ccc cce ccf ccg ccn cco ccr ccs cct ce- cea cec cee cef ceg cen ceo cer ces cet cfa cfc cfe cff cfg cfn cfo cfr cfs cft cga cgc cge cgg cgn cgo cgr cgs cgt cn- cna cnc cne cnf cng cnn cno cnr cns cnt co- coa coc coe cof cog con coo cor cos cot cra crc cre crf crg crn cro crr crs crt csa csc cse csf csg csn cso csr css cst cta ctc cte ctf ctg ctn cto ctr cts ctt eaa eac eae eaf eag ean eao ear eas eat ec- eca ecc ece ecf ecg ecn eco ecr ecs ect eea eec eee eef eeg een eeo eer ees eet ef- efa efc efe eff efg efo efr efs eft ega egc ege egf egg egn ego egr egs egt en- ena enc ene enf eng enn eno enr ens ent eo- eoa eoc eoe eof eog eon eoo eor eos eot era erc ere erf erg ern ero err ers ert es- esa esc ese esf esg esn eso esr ess est eta etc ete etf etg etn eto etr ets ett faa fac fae faf fag fan fao far fas fat fca fcc fce fcf fcg fcn fco fcr fcs fct fea fec fee fef feg fen feo fer fes fet ffa ffc ffe fff ffg ffn ffo ffr ffs fft fga fgc fge fgf fgg fgn fgr fgs fgt fna fnc fne fnf fng fnn fnr fns fnt foa foc foe fof fog fon foo for fos fot fra frc fre frf frg frn fro frr frs frt fsa fsc fse fsf fsg fsn fso fsr fss fst fta ftc fte ftf ftg ftn fto ftr fts ftt gaa gac gae gaf gag gan gao gar gas gat gca gcc gce gcf gcg gcn gco gcr gcs gct ge- gea gec gee gef geg gen geo ger ges get gfa gfc gfe gff gfo gfr gfs gft gga ggc ggg ggn ggo ggr ggs ggt gna gnc gne gnf gnn gno gnr gns gnt goa goc goe gof gog gon goo gor gos got gra grc gre grf grg grn gro grr grs grt gsa gsc gse gsf gsg gsn gso gsr gss gst gta gtc gte gtf gtg gtn gto gtr gts gtt naa nac nae naf nag nan nao nar nas nat nca ncc nce ncf ncg ncn nco ncr ncs nct ne- nea nec nee nef neg nen neo ner nes net nfa nfc nfe nff nfn nfo nfr nfs nft nga ngc nge ngf ngg ngn ngo ngs ngt nna nnc nne nnf nng nnn nno nns nnt no- noa noc noe nof nog non noo nor nos not nra nrc nre nrf nrg nrn nro nrr nrs nrt nsa nsc nse nsf nsg nsn nso nsr nss nst nta ntc nte ntf ntg ntn nto ntr nts ntt oaa oac oae oaf oag oan oao oar oas oat oc- oca occ ocf ocg ocn oco ocr ocs oct oea oec oee oef oeg oen oeo oer oes oet of- ofa ofc ofe off ofg ofn ofo ofr ofs oft oga ogc oge ogf ogg ogn ogo ogs ogt on- ona onc one onf ong onn ono onr ons ont oo- ooa ooc oof oog oon ooo oor oos oot or- ora orc ore orf org orn oro orr ors ort os- osa osc ose osf osg osn oso osr oss ost ot- ota otc ote otf otg otn oto otr ots ott ra- raa rac rae raf rag ran rao rar ras rat rca rcc rce rcf rcg rcn rco rcr rcs rct re- rea rec ree ref reg ren reo rer res ret rfa rfc rfe rff rfg rfn rfo rfr rfs rft rga rgc rge rgf rgg rgn rgo rgr rgs rgt rna rnc rng rnn rno rnr rns rnt roa roc roe rof rog ron roo ror ros rot rra rrc rrf rrg rrn rrr rrs rrt rsa rsc rse rsf rsg rsn rso rsr rss rst rta rtc rte rtf rtg rtn rto rtr rts rtt saa sac sae saf sag san sao sar sas sat sca scc sce scf scg scn sco scr scs sct se- sea sec see sef seg sen seo ser ses set sfa sfc sfe sff sfg sfn sfo sfr sfs sft sga sgc sge sgf sgg sgn sgo sgr sgs sgt sna snc sne snf sng snn sno snr sns snt soa soc soe sof sog son soo sor sos sot sr- sra src sre srf srg srn sro srr srs srt ss- ssa ssc sse ssf ssg ssn sso ssr sss sst sta stc ste stf stg stn sto str sts stt taa tac tae taf tag tan tao tar tas tat tca tcc tce tcf tcg tcn tco tcr tcs tct te- tea tec tee tef teg ten teo ter tes tet tfa tfc tfe tff tfg tfn tfo tfr tfs tft tga tgc tge tgf tgg tgn tgo tgr tgs tgt tna tnc tne tnf tng tnn tno tnr tns tnt to- toa toc toe tof tog ton too tor tos tot tra trc tre trf trg trn tro trr trs trt tsa tsc