-er a-a a-c aaa aac aae aaf aag aar aas aau ac- aca acc ace acf acg acr acs acu aea aec aee aef aeg aer aes aeu af- afa afc afe aff afg afr afs afu ag- aga agc age agf agg agr ags agu ar- ara arc are arf arg arr ars aru as- asa asc ase asf asg asr ass asu au- aua auc aue auf aug aur aus c-- caa cac cae caf cag car cas cau cca ccc cce ccf ccg ccr ccs ccu ce- cea cec cee cef ceg cer ces ceu cfa cfc cfe cff cfg cfr cfs cfu cga cgc cge cgg cgr cgs cgu cra crc cre crf crg crr crs cru csa csc cse csf csg csr css csu cua cuc cue cuf cug cur cus cuu eaa eac eae eaf eag ear eas eau ec- eca ecc ece ecf ecg ecr ecs ecu eea eec eee eef eeg eer ees ef- efa efc efe eff efg efr efs ega egc ege egf egg egr egs egu era erc ere erf erg err ers eru es- esa esc ese esf esg esr ess esu eu- eua euc eue euf eug eur eus faa fac fae faf fag far fas fau fca fcc fce fcf fcg fcr fcs fcu fea fec fee fef feg fer fes feu ffa ffc ffe fff ffg ffr ffs ffu fga fgc fge fgf fgg fgr fgs fra frc fre frf frg frr frs fru fsa fsc fse fsf fsg fsr fss fsu fua fue fuf fug fur fus fuu gaa gac gae gaf gag gar gas gau gca gcc gce gcf gcg gcr gcs gcu ge- gea gec gee gef geg ger ges geu gfa gfc gfe gff gfr gfs gga ggc ggg ggr ggs ggu gra grc gre grf grg grr grs gru gsa gsc gse gsf gsg gsr gss gsu gu- gua guc gue guf gug gur gus guu ra- raa rac rae raf rag rar ras rau rca rcc rce rcf rcg rcr rcs rcu re- rea rec ree ref reg rer res reu rfa rfc rfe rff rfg rfr rfs rfu rga rgc rge rgf rgg rgr rgs rra rrc rrf rrg rrr rrs rru rsa rsc rse rsf rsg rsr rss rsu rua ruc rue ruf rug rur rus ruu saa sac sae saf sag sar sas sau sca scc sce scf scg scr scs scu se- sea sec see sef seg ser ses seu sfa sfc sfe sff sfg sfr sfs sfu sga sgc sge sgf sgg sgr sgs sgu sr- sra src sre srf srg srr srs ss- ssa ssc sse ssf ssg ssr sss ssu sua suc sue suf sug sur sus suu ua- uaa uac uae uaf uag uar uas uau uca ucc uce ucf ucg ucr ucs ucu uea uec uee uef ueg uer ues ufa ufc ufe uff ufg ufr ufs ufu uga ugc uge ugf ugg ugr ugs ugu ur- ura urc ure urf urg urr urs uru usa usc use usf usg usr uss usu uua uuc uue uug uur uus uuu