-er a-a a-c a-t aaa aac aae aag aan aao aap aar aas aat ac- aca acc ace acg acn aco acp acr acs act aea aec aee aeg aen aeo aep aer aes aet ag- aga agc age agg agn ago agp agr ags agt an- ana anc ane ang ann ano anp anr ans ant aoa aoc aoe aog aon aoo aop aor aos aot ap- apa apc ape apg apn apo app apr aps apt ar- ara arc are arg arn aro arp arr ars art as- asa asc ase asg asn aso asp asr ass ast at- ata atc ate atg atn ato atp atr ats att c-- caa cac cae cag can cao cap car cas cat cca ccc cce ccg ccn cco ccp ccr ccs cct ce- cea cec cee ceg cen ceo cep cer ces cet cga cgc cge cgg cgn cgo cgp cgr cgs cgt cn- cna cnc cne cng cnn cno cnp cnr cns cnt co- coa coc coe cog con coo cop cor cos cot cpa cpc cpe cpg cpn cpo cpp cpr cps cpt cra crc cre crg crn cro crp crr crs crt csa csc cse csg csn cso csp csr css cst cta ctc cte ctg ctn cto ctp ctr cts ctt eaa eac eae eag ean eao eap ear eas eat ec- eca ecc ece ecg ecn eco ecr ecs ect eea eec eee eeg een eeo eep eer ees eet ega egc ege egg egn ego egp egr egs egt en- ena enc ene eng enn eno enp enr ens ent eo- eoa eoc eoe eog eon eoo eop eor eos eot ep- epa epc epe epg epn epo epp epr eps ept era erc ere erg ern ero erp err ers ert es- esa esc ese esg esn eso esp esr ess est eta etc ete etg etn eto etp etr ets ett g-p gaa gac gae gag gan gao gap gar gas gat gca gcc gce gcg gcn gco gcp gcr gcs gct ge- gea gec gee geg gen geo gep ger ges get gga ggc ggg ggn ggo ggp ggr ggs ggt gna gnc gne gnn gno gnp gnr gns gnt goa goc goe gog gon goo gop gor gos got gpa gpc gpe gpg gpn gpo gpp gpr gps gpt gra grc gre grg grn gro grp grr grs grt gsa gsc gse gsg gsn gso gsp gsr gss gst gta gtc gte gtg gtn gto gtp gtr gts gtt naa nac nae nag nan nao nap nar nas nat nca ncc nce ncg ncn nco ncp ncr ncs nct ne- nea nec nee neg nen neo nep ner nes net nga ngc nge ngg ngn ngo ngp ngs ngt nna nnc nne nng nnn nno nnp nns nnt no- noa noc noe nog non noo nop nor nos not npa npc npe npg npn npo npp npr nps npt nra nrc nre nrg nrn nro nrp nrr nrs nrt nsa nsc nse nsg nsn nso nsp nsr nss nst nta ntc nte ntg ntn nto ntp ntr nts ntt oaa oac oae oag oan oao oap oar oas oat oc- oca occ ocg ocn oco ocp ocr ocs oct oea oec oee oeg oen oeo oep oer oes oet oga ogc oge ogg ogn ogo ogp ogs ogt on- ona onc one ong onn ono onp onr ons ont oo- ooa ooc oog oon ooo oop oor oos oot op- opa opc ope opg opn opo opp opr ops opt or- ora orc ore org orn oro orp orr ors ort os- osa osc ose osg osn oso osp osr oss ost ot- ota otc ote otg otn oto otp otr ots ott p-p paa pac pae pag pan pao pap par pas pat pca pcc pce pcg pcn pco pcp pcr pcs pct pea pec pee peg pen peo pep per pes pet pga pgc pge pgg pgn pgo pgp pgr pgs pgt pn- pna pnc pne png pnn pno pnp pnr pns pnt poa poc poe pog pon poo pop por pos pot ppa ppc ppe ppg ppn ppo ppp ppr pps ppt pra prc pre prg prn pro prp prr prs prt ps- psa psc pse psg psn pso psp psr pss pst pt- pta ptc pte ptg ptn pto ptp ptr pts ptt ra- raa rac rae rag ran rao rap rar ras rat rca rcc rce rcg rcn rco rcp rcr rcs rct re- rea rec ree reg ren reo rep rer res ret rga rgc rge rgg rgn rgo rgp rgr rgs rgt rna rnc rng rnn rno rnp rnr rns rnt roa roc roe rog ron roo rop ror ros rot rpa rpc rpe rpg rpn rpo rpp rpr rps rpt rra rrc rrg rrn rrp rrr rrs rrt rsa rsc rse rsg rsn rso rsp rsr rss rst rta rtc rte rtg rtn rto rtp rtr rts rtt saa sac sae sag san sao sap sar sas sat sca scc sce scg scn sco scp scr scs sct se- sea sec see seg sen seo sep ser ses set sga sgc sge sgg sgn sgo sgp sgr sgs sgt sna snc sne sng snn sno snp snr sns snt soa soc soe sog son soo sop sor sos sot spa spc spe spg spn spo spp spr sps spt sr- sra src sre srg srn sro srp srr srs srt ss- ssa ssc sse ssg ssn sso ssp ssr sss sst sta stc ste stg stn sto stp str sts stt taa tac tae tag tan tao tap tar tas tat tca tcc tce tcg tcn tco tcp tcr tcs tct te- tea tec tee teg ten teo tep ter tes tet tga tgc tge tgg tgn tgo tgp tgr tgs tgt tna tnc tne tng tnn tno tnp tnr tns tnt to- toa toc toe tog ton too top tor tos tot tpa tpc tpe tpg tpn tpo tpp tpr tps