a-a a-b aaa aab aad aae aah aas ab- aba abb abd abe abh abs ad- ada adb add ade adh ads aea aeb aed aee aeh aes aha ahb ahd ahe ahh ahs as- asa asb asd ase ash ass baa bab bad bae bah bas bba bbb bbd bbe bbh bbs bda bdb bdd bde bdh bds be- bea beb bed bee beh bes bha bhb bhd bhe bhh bhs bsa bsb bsd bse bsh bss daa dab dad dae dah das dba dbb dbd dbe dbh dbs dda ddb ddd dde ddh dds de- dea deb ded dee deh des dh- dha dhb dhd dhe dhh dhs dsa dsb dsd dse dsh dss eaa eab ead eae eah eas eba ebb ebd ebe ebh ebs ed- eda edb edd ede edh eds eea eeb eed eee ees eha ehb ehd ehe ehh ehs es- esa esb esd ese esh ess haa hab had hae hah has hba hbb hbd hbe hbh hbs hda hdb hdd hde hdh hds he- hea heb hed hee heh hes hha hhb hhd hhe hhh hhs hsa hsb hsd hse hsh hss saa sab sad sae sah sas sba sbb sbd sbe sbh sbs sda sdb sdd sde sdh sds se- sea seb sed see seh ses sh- sha shb shd she shh shs ss- ssa ssb ssd sse ssh sss