-er a-a a-b aaa aab aad aae aah aar aas ab- aba abb abd abe abh abr abs ad- ada adb add ade adh adr ads aea aeb aed aee aeh aer aes aha ahb ahd ahe ahh ahr ahs ar- ara arb ard are arh arr ars as- asa asb asd ase ash asr ass baa bab bad bae bah bar bas bba bbb bbd bbe bbh bbr bbs bda bdb bdd bde bdh bdr bds be- bea beb bed bee beh ber bes bha bhb bhd bhe bhh bhr bhs bra brb brd bre brh brr brs bsa bsb bsd bse bsh bsr bss daa dab dad dae dah dar das dba dbb dbd dbe dbh dbr dbs dda ddb ddd dde ddh ddr dds de- dea deb ded dee deh der des dh- dha dhb dhd dhe dhh dhr dhs dra drb drd dre drr drs dsa dsb dsd dse dsh dsr dss eaa eab ead eae eah ear eas eba ebb ebd ebe ebh ebr ebs ed- eda edb edd ede edh edr eds eea eeb eed eee eer ees eha ehb ehd ehe ehh ehr ehs era erb erd ere erh err ers es- esa esb esd ese esh esr ess haa hab had hae hah har has hba hbb hbd hbe hbh hbr hbs hda hdb hdd hde hdh hdr hds he- hea heb hed hee heh her hes hha hhb hhd hhe hhh hhr hhs hr- hra hrb hrd hre hrh hrr hrs hsa hsb hsd hse hsh hsr hss ra- raa rab rad rae rah rar ras rba rbb rbd rbe rbh rbr rbs rda rdb rdd rde rdh rdr rds re- rea reb red ree reh rer res rh- rha rhb rhd rhe rhh rhr rhs rra rrb rrd rrh rrr rrs rsa rsb rsd rse rsh rsr rss saa sab sad sae sah sar sas sba sbb sbd sbe sbh sbr sbs sda sdb sdd sde sdh sdr sds se- sea seb sed see seh ser ses sh- sha shb shd she shh shr shs sr- sra srb srd sre srh srr srs ss- ssa ssb ssd sse ssh ssr sss