-al -ol a-a a-b aaa aab aad aaf aah aal aao ab- aba abb abd abf abh abl abo ad- ada adb add adf adh adl ado af- afa afb afd aff afh afl afo aha ahb ahd ahf ahh ahl aho al- ala alb ald alf alh all alo aoa aob aod aof aoh aol aoo baa bab bad baf bah bal bao bba bbb bbd bbf bbh bbl bbo bda bdb bdd bdf bdh bdl bdo bfa bfb bfd bff bfh bfl bfo bha bhb bhd bhf bhh bhl bho bla blb bld blf blh bll blo boa bob bod bof boh bol boo daa dab dad daf dah dal dao dba dbb dbd dbf dbh dbl dbo dda ddb ddd ddf ddh ddl ddo dfa dfb dfd dff dfh dfl dfo dh- dha dhb dhd dhf dhh dhl dho dl- dla dlb dld dlf dlh dll dlo doa dob dod dof doh dol doo faa fab fad faf fah fal fao fba fbb fbd fbf fbh fbl fbo fda fdb fdd fdf fdh fdl fdo ffa ffd fff ffh ffl ffo fha fhb fhf fhh fhl fho fla flb fld flf fll flo foa fob fof foh fol foo haa hab had haf hah hal hao hba hbb hbd hbf hbh hbl hbo hda hdb hdd hdf hdh hdl hdo hfa hfb hfd hff hfh hfl hfo hha hhb hhd hhf hhh hhl hho hla hlb hld hlf hlh hll hlo hoa hob hod hof hoh hol hoo la- laa lab lad laf lah lal lao lba lbb lbd lbf lbh lbl lbo lda ldb ldd ldf ldh ldl ldo lfa lfb lfd lff lfh lfl lfo lha lhb lhd lhf lhh lho lla llb lld llf lll llo loa lob lod lof loh lol loo oaa oab oad oaf oah oal oao ob- oba obb obd obf obh obl obo oda odb odd odf odh odl odo of- ofa ofb ofd off ofl ofo oha ohd ohf ohh ohl oho ola olb old olf oll olo oo- ooa oob ood oof ooh ool ooo