-al -ol a-a a-b aaa aab aad aal aao aav ab- aba abb abd abl abo abv ad- ada adb add adl ado adv al- ala alb ald all alo alv aoa aob aod aol aoo aov av- ava avb avd avl avo baa bab bad bal bao bav bba bbb bbd bbl bbo bda bdb bdd bdl bdo bdv bla blb bld bll blo blv boa bob bod bol boo bov bva bvb bvd bvl bvo bvv daa dab dad dal dao dav dba dbb dbd dbl dbo dbv dda ddb ddd ddl ddo dl- dla dlb dld dll dlo dlv doa dob dod dol doo dov dva dvb dvd dvl la- laa lab lad lal lao lav lba lbb lbd lbl lbo lbv lda ldb ldd ldl ldo ldv lla llb lld lll llo llv loa lob lod lol loo lov lva lvb lvd lvl lvv oaa oab oad oal oao oav ob- oba obb obd obl obo obv oda odb odd odl odo odv ola olb old oll olo oo- ooa oob ood ool ooo oov ov- ova ovb ovd ovl ovo ovv v-a vaa vab vad val vao vav vba vbd vbl vbo vbv vdb vdd vdl vdo vdv vl- vla vlb vld vll vlo vlv voa vob vod vol voo vov vva vvb vvo vvv