-al -ol a-a a-b aaa aab aad aal aao aau ab- aba abb abd abl abo abu ad- ada adb add adl ado adu al- ala alb ald all alo alu aoa aob aod aol aoo aou au- aua aub aud aul auo b-u baa bab bad bal bao bau bba bbb bbd bbl bbo bbu bda bdb bdd bdl bdo bdu bla blb bld bll blo blu boa bob bod bol boo bou bua bub bud bul buo buu daa dab dad dal dao dau dba dbb dbd dbl dbo dbu dda ddb ddd ddl ddo ddu dl- dla dlb dld dll dlo dlu doa dob dod dol doo dou dua dub dud dul duo la- laa lab lad lal lao lau lba lbb lbd lbl lbo lbu lda ldb ldd ldl ldo ldu lla llb lld lll llo llu loa lob lod lol loo lou lua lub lud lul luo luu oaa oab oad oal oao oau ob- oba obb obd obl obo obu oda odb odd odl odo odu ola olb old oll olo olu oo- ooa oob ood ool ooo ou- oua oud oul ouo ua- uaa uab uad ual uao uau uba ubb ubl ubo ubu uda udb udd udl udo udu ula ulb uld ull ulo ulu uoa uob uod uol uoo uua uuu