a-a a-b aaa aab aad aah aao aas aay ab- aba abb abd abh abo abs aby ad- ada adb add adh ado ads ady aha ahb ahd ahh aho ahs ahy aoa aob aod aoh aoo aos as- asa asb asd ash aso ass asy ay- aya ayd ayh ayo ays baa bab bad bah bao bas bay bba bbb bbd bbh bbo bbs bby bda bdb bdd bdh bdo bds bdy bha bhb bhd bhh bho bhs boa bob bod boh boo bos boy bsa bsb bsd bsh bso bss bsy by- bya byd byh byo bys daa dab dad dah dao das day dba dbb dbd dbh dbo dbs dby dda ddb ddd ddh ddo dds ddy dh- dha dhb dhd dhh dho dhs doa dob dod doh doo dos doy dsa dsb dsd dsh dso dss dsy dy- dya dyb dyd dyo dys dyy haa hab had hah hao has hay hba hbb hbd hbh hbo hbs hby hda hdb hdd hdh hdo hds hdy hha hhb hhd hhh hho hhs hhy hoa hob hod hoh hoo hos hoy hsa hsb hsd hsh hss hsy hy- hya hyb hyd hyh hyo hys hyy oaa oab oad oah oao oas ob- oba obb obd obh obo obs oby oda odb odd odh odo ods oha ohd ohh oho ohs oo- ooa oob ood ooh ooo oos os- osa osb osd osh oso oss oya oyd oyo oys saa sab sad sah sao sas say sba sbb sbd sbh sbo sbs sby sda sdb sdd sdh sdo sds sdy sh- sha shb shd shh sho shs shy soa sob sod soh soo sos soy ss- ssa ssb ssd ssh sso sss sy- sya syb syd syh sys yaa yab yad yah yao yas yay ybs yby yda ydo yds ydy yha yhs yob yod yoo yos yoy ysa ysb yso yss ysy yyb yys yyy