-er a-a a-b aaa aab aae aag aah aar aas ab- aba abb abe abg abh abr abs aea aeb aee aeg aeh aer aes ag- aga agb age agg agh agr ags aha ahb ahe ahg ahh ahr ahs ar- ara arb are arg arh arr ars as- asa asb ase asg ash asr ass baa bab bae bag bah bar bas bba bbb bbe bbg bbh bbr bbs be- bea beb bee beg beh ber bes bga bgb bge bgg bgh bgr bgs bha bhb bhe bhg bhh bhr bhs bra brb bre brg brh brr brs bsa bsb bse bsg bsh bsr bss eaa eab eae eag eah ear eas eba ebb ebe ebg ebh ebr ebs eea eeb eee eeg eer ees ega egb ege egg egh egr egs eha ehb ehe ehg ehh ehr ehs era erb ere erg erh err ers es- esa esb ese esg esh esr ess gaa gab gae gag gah gar gas gba gbe gbg gbh gbr gbs ge- gea geb gee geg geh ger ges gga ggb ggg ggh ggr ggs gha ghb ghe ghg ghh ghr ghs gra grb gre grg grh grr grs gsa gsb gse gsg gsr gss haa hab hae hag hah har has hba hbb hbe hbg hbh hbr hbs he- hea heb hee heg heh her hes hga hgb hge hgg hgh hgr hgs hha hhb hhe hhg hhh hhr hhs hr- hra hrb hre hrg hrh hrr hrs hsa hsb hse hsg hsh hsr hss ra- raa rab rae rag rah rar ras rba rbb rbe rbg rbh rbr rbs re- rea reb ree reg reh rer res rga rgb rge rgg rgh rgr rgs rh- rha rhb rhe rhg rhh rhr rhs rra rrb rrg rrh rrr rrs rsa rsb rse rsg rsh rsr rss saa sab sae sag sah sar sas sba sbb sbe sbg sbh sbr sbs se- sea seb see seg seh ser ses sga sgb sge sgg sgh sgr sgs sh- sha shb she shg shh shr shs sr- sra srb sre srg srh srr srs ss- ssa ssb sse ssg ssh ssr sss