-al -ol a-a a-b aaa aab aad aah aal aao ab- aba abb abd abh abl abo ad- ada adb add adh adl ado aha ahb ahd ahh ahl aho al- ala alb ald alh all alo aoa aob aod aoh aol aoo baa bab bad bah bal bao bba bbb bbd bbh bbl bbo bda bdb bdd bdh bdl bdo bha bhb bhd bhh bhl bho bla blb bld blh bll blo boa bob bod boh bol boo daa dab dad dah dal dao dba dbb dbd dbh dbl dbo dda ddb ddd ddh ddl ddo dh- dha dhb dhd dhh dhl dho dl- dla dlb dld dlh dll dlo doa dob dod doh dol doo haa hab had hah hal hao hba hbb hbd hbh hbl hbo hda hdb hdd hdh hdl hdo hha hhb hhd hhh hhl hho hla hlb hld hlh hll hlo hoa hob hod hoh hol hoo la- laa lab lad lah lal lao lba lbb lbd lbh lbl lbo lda ldb ldd ldh ldl ldo lha lhb lhd lhh lho lla llb lld lll llo loa lob lod loh lol loo oaa oab oad oah oal oao ob- oba obb obd obh obl obo oda odb odd odh odl odo oha ohd ohh ohl oho ola olb old oll olo oo- ooa oob ood ooh ool ooo