-al a-a a-b aaa aab aag aal aan ab- aba abb abg abl abn ag- aga agb agg agl agn al- ala alb alg all aln an- ana anb ang anl ann baa bab bag bal ban bba bbb bbg bbl bbn bga bgb bgg bgl bgn bla blb blg bll bln bna bnb bng bnl bnn gaa gab gag gal gan gba gbg gbl gbn gga ggb ggg ggn gla glb glg gll gln gna gnb gnl gnn la- laa lab lag lal lan lba lbb lbg lbl lga lgb lgg lgl lgn lla llb llg lll lln lna lnb lng lnl lnn naa nab nag nal nan nba nbb nbg nbl nbn nga ngb ngg ngl ngn nla nlb nlg nll nln nna nnb nng nnl nnn