-al a-a a-b aaa aab aae aal aam aan ab- aba abb abe abl abm abn aea aeb aee ael aem aen al- ala alb ale all alm aln ama amb ame aml amm amn an- ana anb ane anl anm ann baa bab bae bal bam ban bba bbb bbe bbl bbm bbn be- bea beb bee bel bem ben bla blb ble bll blm bln bma bmb bme bml bmm bmn bna bnb bne bnl bnn eaa eab eae eal eam ean eba ebb ebe ebl ebm ebn eea eeb eee eel eem een ela elb ele ell elm eln em- ema emb eme eml emm emn en- ena enb ene enl enm enn la- laa lab lae lal lam lan lba lbb lbe lbl lbm lea leb lee lel lem len lla llb lle lll llm lln lma lmb lme lml lmm lmn lna lnb lne lnl lnm lnn maa mab mae mal mam man mba mbb mbe mbl mbm mea meb mee mel mem men mla mlb mle mll mlm mln mma mmb mme mml mmm mmn mna mnb mne mnl mnm mnn naa nab nae nal nam nan nba nbb nbe nbl nbm nbn ne- nea neb nee nel nem nen nla nlb nle nll nlm nln nma nmb nme nml nmm nmn nna nnb nne nnl nnm nnn