-al -ol a-a a-b aaa aab aak aal aao aav ab- aba abb abk abl abo abv aka akb akk akl ako akv al- ala alb alk all alo alv aoa aob aok aol aoo aov av- ava avb avk avl avo baa bab bak bal bao bav bba bbb bbk bbl bbo bka bkb bkk bkl bko bkv bla blb blk bll blo blv boa bob bok bol boo bov bva bvb bvk bvl bvo bvv ka- kaa kab kak kal kao kav kba kbb kbk kbl kbo kkb kkk kkl kkv kl- kla klb klo klv koa kob kok kol koo kva kvb kvk kvo kvv la- laa lab lak lal lao lav lba lbb lbk lbl lbo lbv lka lkb lkl lla llb llk lll llo llv loa lob lok lol loo lov lva lvb lvl lvv oaa oab oak oal oao oav ob- oba obb obk obl obo obv oka okb okk okl oko ola olb olk oll olo oo- ooa oob ook ool ooo oov ov- ova ovb ovl ovo ovv v-a vaa vab vak val vao vav vba vbk vbl vbo vbv vka vkb vl- vla vlb vlk vll vlo vlv voa vob vok vol voo vov vva vvb vvo vvv