-er a-a a-b aaa aab aad aae aah aak aar aas ab- aba abb abd abe abh abk abr abs ad- ada adb add ade adh adk adr ads aea aeb aed aee aeh aek aer aes aha ahb ahd ahe ahh ahk ahr ahs aka akb akd ake akh akk akr aks ar- ara arb ard are arh ark arr ars as- asa asb asd ase ash ask asr ass baa bab bad bae bah bak bar bas bba bbb bbd bbe bbh bbk bbr bbs bda bdb bdd bde bdh bdk bdr bds be- bea beb bed bee beh bek ber bes bha bhb bhd bhe bhh bhk bhr bhs bka bkb bke bkk bkr bks bra brb brd bre brh brk brr brs bsa bsb bsd bse bsh bsk bsr bss daa dab dad dae dah dak dar das dba dbb dbd dbe dbh dbk dbr dbs dda ddb ddd dde ddh ddk ddr dds de- dea deb ded dee deh dek der des dh- dha dhb dhd dhe dhh dhk dhr dhs dka dkb dke dkk dkr dks dra drb drd dre drk drr drs dsa dsb dsd dse dsh dsk dsr dss eaa eab ead eae eah eak ear eas eba ebb ebd ebe ebh ebk ebr ebs ed- eda edb edd ede edh edk edr eds eea eeb eed eee eek eer ees eha ehb ehd ehe ehh ehr ehs eka ekb ekd eke ekh ekr eks era erb erd ere erh erk err ers es- esa esb esd ese esh esk esr ess haa hab had hae hah hak har has hba hbb hbd hbe hbh hbk hbr hbs hda hdb hdd hde hdh hdk hdr hds he- hea heb hed hee heh hek her hes hha hhb hhd hhe hhh hhk hhr hhs hka hkb hkd hkh hkk hkr hks hr- hra hrb hrd hre hrh hrk hrr hrs hsa hsb hsd hse hsh hsk hsr hss ka- kaa kab kad kae kah kak kar kas kba kbb kbd kbe kbh kbk kbr kbs kda kdb kde kdh kdk kdr kds ke- kea keb ked kee keh kek ker kes kha khe khh khk khr khs kkb kke kkh kkk kkr kks kra krd krk krr krs ksa ksb ksd kse ksh ksk ksr kss ra- raa rab rad rae rah rak rar ras rba rbb rbd rbe rbh rbk rbr rbs rda rdb rdd rde rdh rdr rds re- rea reb red ree reh rek rer res rh- rha rhb rhd rhe rhh rhr rhs rkb rke rkk rks rra rrb rrd rrh rrk rrr rrs rsa rsb rsd rse rsh rsk rsr rss saa sab sad sae sah sak sar sas sba sbb sbd sbe sbh sbk sbr sbs sda sdb sdd sde sdh sdk sdr sds se- sea seb sed see seh sek ser ses sh- sha shb shd she shh shk shr shs sk- ska skb skd ske skh skk skr sks sr- sra srb srd sre srh srk srr srs ss- ssa ssb ssd sse ssh ssk ssr sss