-al a-a a-b aaa aab aal aan aav ab- aba abb abl abn abv al- ala alb all aln alv an- ana anb anl ann anv av- ava avb avl avn baa bab bal ban bav bba bbb bbl bbn bla blb bll bln blv bna bnb bnl bnn bnv bva bvb bvl bvn bvv la- laa lab lal lan lav lba lbb lbl lbv lla llb lll lln llv lna lnb lnl lnn lva lvb lvl lvn lvv naa nab nal nan nav nba nbb nbl nbn nbv nla nlb nll nln nlv nna nnb nnl nnn nnv nva nvb nvl nvn nvv v-a vaa vab val van vav vba vbl vbv vl- vla vlb vll vlv vn- vna vnl vnv vva vvb vvv