-er a-a a-b aaa aab aae aag aah aan aar aas ab- aba abb abe abg abh abn abr abs aea aeb aee aeg aeh aen aer aes ag- aga agb age agg agh agn agr ags aha ahb ahe ahg ahh ahn ahr ahs an- ana anb ane ang anh ann anr ans ar- ara arb are arg arh arn arr ars as- asa asb ase asg ash asn asr ass baa bab bae bag bah ban bar bas bba bbb bbe bbg bbh bbn bbr bbs be- bea beb bee beg beh ben ber bes bga bgb bge bgg bgh bgn bgr bgs bha bhb bhe bhg bhh bhr bhs bna bnb bne bng bnn bnr bns bra brb bre brg brh brn brr brs bsa bsb bse bsg bsh bsn bsr bss eaa eab eae eag eah ean ear eas eba ebb ebe ebg ebh ebn ebr ebs eea eeb eee eeg een eer ees ega egb ege egg egh egn egr egs eha ehb ehe ehg ehh ehn ehr ehs en- ena enb ene eng enh enn enr ens era erb ere erg erh ern err ers es- esa esb ese esg esh esn esr ess gaa gab gae gag gah gan gar gas gba gbe gbg gbh gbn gbr gbs ge- gea geb gee geg geh gen ger ges gga ggb ggg ggh ggn ggr ggs gha ghb ghe ghg ghh ghn ghr ghs gna gnb gne gnn gnr gns gra grb gre grg grh grn grr grs gsa gsb gse gsg gsn gsr gss haa hab hae hag hah han har has hba hbb hbe hbg hbh hbn hbr hbs he- hea heb hee heg heh hen her hes hga hgb hge hgg hgh hgn hgr hgs hha hhb hhe hhg hhh hhn hhr hhs hna hnb hne hng hnh hnn hns hr- hra hrb hre hrg hrh hrn hrr hrs hsa hsb hse hsg hsh hsn hsr hss naa nab nae nag nah nan nar nas nba nbb nbe nbg nbn nbr nbs ne- nea neb nee neg neh nen ner nes nga ngb nge ngg ngh ngn ngs nha nhb nhe nhg nhh nhn nhr nhs nna nnb nne nng nnh nnn nns nra nrb nre nrg nrn nrr nrs nsa nsb nse nsg nsh nsn nsr nss ra- raa rab rae rag rah ran rar ras rba rbb rbe rbg rbh rbn rbr rbs re- rea reb ree reg reh ren rer res rga rgb rge rgg rgh rgn rgr rgs rh- rha rhb rhe rhg rhh rhn rhr rhs rna rnb rng rnh rnn rnr rns rra rrb rrg rrh rrn rrr rrs rsa rsb rse rsg rsh rsn rsr rss saa sab sae sag sah san sar sas sba sbb sbe sbg sbh sbn sbr sbs se- sea seb see seg seh sen ser ses sga sgb sge sgg sgh sgn sgr sgs sh- sha shb she shg shh shn shr shs sna snb sne sng snn snr sns sr- sra srb sre srg srh srn srr srs ss- ssa ssb sse ssg ssh ssn ssr sss