-er a-a a-c aaa aac aae aag aan aao aar aas aau ac- aca acc ace acg acn aco acr acs acu aea aec aee aeg aen aeo aer aes aeu ag- aga agc age agg agn ago agr ags agu an- ana anc ane ang ann ano anr ans anu aoa aoc aoe aog aon aoo aor aos aou ar- ara arc are arg arn aro arr ars aru as- asa asc ase asg asn aso asr ass asu au- aua auc aue aug aun auo aur aus c-- caa cac cae cag can cao car cas cau cca ccc cce ccg ccn cco ccr ccs ccu ce- cea cec cee ceg cen ceo cer ces ceu cga cgc cge cgg cgn cgo cgr cgs cgu cn- cna cnc cne cng cnn cno cnr cns cnu co- coa coc coe cog con coo cor cos cou cra crc cre crg crn cro crr crs cru csa csc cse csg csn cso csr css csu cua cuc cue cug cun cuo cur cus cuu eaa eac eae eag ean eao ear eas eau ec- eca ecc ece ecg ecn eco ecr ecs ecu eea eec eee eeg een eeo eer ees ega egc ege egg egn ego egr egs egu en- ena enc ene eng enn eno enr ens enu eo- eoa eoc eoe eog eon eoo eor eos eou era erc ere erg ern ero err ers eru es- esa esc ese esg esn eso esr ess esu eu- eua euc eue eug eun eur eus gaa gac gae gag gan gao gar gas gau gca gcc gce gcg gcn gco gcr gcs gcu ge- gea gec gee geg gen geo ger ges geu gga ggc ggg ggn ggo ggr ggs ggu gna gnc gne gnn gno gnr gns gnu goa goc goe gog gon goo gor gos gou gra grc gre grg grn gro grr grs gru gsa gsc gse gsg gsn gso gsr gss gsu gu- gua guc gue gug gun guo gur gus guu naa nac nae nag nan nao nar nas nau nca ncc nce ncg ncn nco ncr ncs ncu ne- nea nec nee neg nen neo ner nes neu nga ngc nge ngg ngn ngo ngs ngu nna nnc nne nng nnn nno nns nnu no- noa noc noe nog non noo nor nos nou nra nrc nre nrg nrn nro nrr nrs nru nsa nsc nse nsg nsn nso nsr nss nsu nua nuc nue nug nun nuo nur nus nuu oaa oac oae oag oan oao oar oas oau oc- oca occ ocg ocn oco ocr ocs ocu oea oec oee oeg oen oeo oer oes oga ogc oge ogg ogn ogo ogs on- ona onc one ong onn ono onr ons onu oo- ooa ooc oog oon ooo oor oos or- ora orc ore org orn oro orr ors oru os- osa osc ose osg osn oso osr oss osu ou- oua ouc oue oun ouo our ous ra- raa rac rae rag ran rao rar ras rau rca rcc rce rcg rcn rco rcr rcs rcu re- rea rec ree reg ren reo rer res reu rga rgc rge rgg rgn rgo rgr rgs rna rnc rng rnn rno rnr rns rnu roa roc roe rog ron roo ror ros rou rra rrc rrg rrn rrr rrs rru rsa rsc rse rsg rsn rso rsr rss rsu rua ruc rue rug run ruo rur rus ruu saa sac sae sag san sao sar sas sau sca scc sce scg scn sco scr scs scu se- sea sec see seg sen seo ser ses seu sga sgc sge sgg sgn sgo sgr sgs sgu sna snc sne sng snn sno snr sns snu soa soc soe sog son soo sor sos sou sr- sra src sre srg srn sro srr srs ss- ssa ssc sse ssg ssn sso ssr sss ssu sua suc sue sug sun suo sur sus suu ua- uaa uac uae uag uan uao uar uas uau uca ucc uce ucg ucn uco ucr ucs ucu uea uec uee ueg uen uer ues uga ugc uge ugg ugn ugo ugr ugs ugu un- una unc une ung unn uno unr uns unu uoa uoc uoe uog uon uoo uor uos ur- ura urc ure urg urn uro urr urs uru usa usc use usg usn uso usr uss usu uua uuc uue uug uun uur uus uuu