a-a a-b aaa aab aad aae aah aak aas ab- aba abb abd abe abh abk abs ad- ada adb add ade adh adk ads aea aeb aed aee aeh aek aes aha ahb ahd ahe ahh ahk ahs aka akb akd ake akh akk aks as- asa asb asd ase ash ask ass baa bab bad bae bah bak bas bba bbb bbd bbe bbh bbk bbs bda bdb bdd bde bdh bdk bds be- bea beb bed bee beh bek bes bha bhb bhd bhe bhh bhk bhs bka bkb bke bkk bks bsa bsb bsd bse bsh bsk bss daa dab dad dae dah dak das dba dbb dbd dbe dbh dbk dbs dda ddb ddd dde ddh ddk dds de- dea deb ded dee deh dek des dh- dha dhb dhd dhe dhh dhk dhs dka dkb dke dkk dks dsa dsb dsd dse dsh dsk dss eaa eab ead eae eah eak eas eba ebb ebd ebe ebh ebk ebs ed- eda edb edd ede edh edk eds eea eeb eed eee eek ees eha ehb ehd ehe ehh ehs eka ekb ekd eke ekh eks es- esa esb esd ese esh esk ess haa hab had hae hah hak has hba hbb hbd hbe hbh hbk hbs hda hdb hdd hde hdh hdk hds he- hea heb hed hee heh hek hes hha hhb hhd hhe hhh hhk hhs hka hkb hkd hkh hkk hks hsa hsb hsd hse hsh hsk hss ka- kaa kab kad kae kah kak kas kba kbb kbd kbe kbh kbk kbs kda kdb kde kdh kdk kds ke- kea keb ked kee keh kek kes kha khe khh khk khs kkb kke kkh kkk kks ksa ksb ksd kse ksh ksk kss saa sab sad sae sah sak sas sba sbb sbd sbe sbh sbk sbs sda sdb sdd sde sdh sdk sds se- sea seb sed see seh sek ses sh- sha shb shd she shh shk shs sk- ska skb skd ske skh skk sks ss- ssa ssb ssd sse ssh ssk sss