a-a a-b aaa aab aad aae aah aao aas ab- aba abb abd abe abh abo abs ad- ada adb add ade adh ado ads aea aeb aed aee aeh aeo aes aha ahb ahd ahe ahh aho ahs aoa aob aod aoe aoh aoo aos as- asa asb asd ase ash aso ass baa bab bad bae bah bao bas bba bbb bbd bbe bbh bbo bbs bda bdb bdd bde bdh bdo bds be- bea beb bed bee beh beo bes bha bhb bhd bhe bhh bho bhs boa bob bod boe boh boo bos bsa bsb bsd bse bsh bso bss daa dab dad dae dah dao das dba dbb dbd dbe dbh dbo dbs dda ddb ddd dde ddh ddo dds de- dea deb ded dee deh deo des dh- dha dhb dhd dhe dhh dho dhs doa dob dod doe doh doo dos dsa dsb dsd dse dsh dso dss eaa eab ead eae eah eao eas eba ebb ebd ebe ebh ebo ebs ed- eda edb edd ede edh edo eds eea eeb eed eee eeo ees eha ehb ehd ehe ehh eho ehs eo- eoa eob eod eoe eoh eoo eos es- esa esb esd ese esh eso ess haa hab had hae hah hao has hba hbb hbd hbe hbh hbo hbs hda hdb hdd hde hdh hdo hds he- hea heb hed hee heh heo hes hha hhb hhd hhe hhh hho hhs hoa hob hod hoe hoh hoo hos hsa hsb hsd hse hsh hss oaa oab oad oae oah oao oas ob- oba obb obd obe obh obo obs oda odb odd ode odh odo ods oea oeb oed oee oeh oeo oes oha ohd ohe ohh oho ohs oo- ooa oob ood ooh ooo oos os- osa osb osd ose osh oso oss saa sab sad sae sah sao sas sba sbb sbd sbe sbh sbo sbs sda sdb sdd sde sdh sdo sds se- sea seb sed see seh seo ses sh- sha shb shd she shh sho shs soa sob sod soe soh soo sos ss- ssa ssb ssd sse ssh sso sss