-er -th a-a a-b a-t aaa aab aae aag aah aar aas aat ab- aba abb abe abg abh abr abs abt aea aeb aee aeg aeh aer aes aet ag- aga agb age agg agh agr ags agt aha ahb ahe ahg ahh ahr ahs aht ar- ara arb are arg arh arr ars art as- asa asb ase asg ash asr ass ast at- ata atb ate atg ath atr ats att baa bab bae bag bah bar bas bat bba bbb bbe bbg bbh bbr bbs bbt be- bea beb bee beg beh ber bes bet bga bgb bge bgg bgh bgr bgs bgt bha bhb bhe bhg bhh bhr bhs bht bra brb bre brg brh brr brs brt bsa bsb bse bsg bsh bsr bss bst bta btb bte btg bth btr bts btt eaa eab eae eag eah ear eas eat eba ebb ebe ebg ebh ebr ebs ebt eea eeb eee eeg eer ees eet ega egb ege egg egh egr egs egt eha ehb ehe ehg ehh ehr ehs eht era erb ere erg erh err ers ert es- esa esb ese esg esh esr ess est eta etb ete etg eth etr ets ett gaa gab gae gag gah gar gas gat gba gbe gbg gbh gbr gbs gbt ge- gea geb gee geg geh ger ges get gga ggb ggg ggh ggr ggs ggt gha ghb ghe ghg ghh ghr ghs ght gra grb gre grg grh grr grs grt gsa gsb gse gsg gsr gss gst gta gtb gte gtg gth gtr gts gtt haa hab hae hag hah har has hat hba hbb hbe hbg hbh hbr hbs hbt he- hea heb hee heg heh her hes het hga hgb hge hgg hgh hgr hgs hgt hha hhb hhe hhg hhh hhr hhs hht hr- hra hrb hre hrg hrh hrr hrs hrt hsa hsb hse hsg hsh hsr hss hst hta htb hte htg hth htr hts htt ra- raa rab rae rag rah rar ras rat rba rbb rbe rbg rbh rbr rbs rbt re- rea reb ree reg reh rer res ret rga rgb rge rgg rgh rgr rgs rgt rh- rha rhb rhe rhg rhh rhr rhs rht rra rrb rrg rrh rrr rrs rrt rsa rsb rse rsg rsh rsr rss rst rta rtb rte rtg rtr rts rtt saa sab sae sag sah sar sas sat sba sbb sbe sbg sbh sbr sbs sbt se- sea seb see seg seh ser ses set sga sgb sge sgg sgh sgr sgs sgt sh- sha shb she shg shh shr shs sht sr- sra srb sre srg srh srr srs srt ss- ssa ssb sse ssg ssh ssr sss sst sta stb ste stg sth str sts stt taa tab tae tag tah tar tas tat tba tbb tbe tbg tbh tbr tbs tbt te- tea teb tee teg teh ter tes tet tga tgb tge tgg tgh tgr tgs tgt th- tha thb the thg thh thr ths tht tra trb tre trg trh trr trs trt tsa tsb tse tsg tsh tsr tss tst tta ttb tte ttg tth ttr tts ttt