-al a-a a-b a-t aaa aab aae aal aam aan aat ab- aba abb abe abl abm abn abt aea aeb aee ael aem aen aet al- ala alb ale all alm aln alt ama amb ame aml amm amn amt an- ana anb ane anl anm ann ant at- ata atb ate atl atm atn att baa bab bae bal bam ban bat bba bbb bbe bbl bbm bbn bbt be- bea beb bee bel bem ben bet bla blb ble bll blm bln blt bma bmb bme bml bmm bmn bmt bna bnb bne bnl bnn bnt bta btb bte btl btm btn btt eaa eab eae eal eam ean eat eba ebb ebe ebl ebm ebn ebt eea eeb eee eel eem een eet ela elb ele ell elm eln elt em- ema emb eme eml emm emn emt en- ena enb ene enl enm enn ent eta etb ete etl etm etn ett la- laa lab lae lal lam lan lat lba lbb lbe lbl lbm lbt lea leb lee lel lem len let lla llb lle lll llm lln llt lma lmb lme lml lmm lmn lmt lna lnb lne lnl lnm lnn lnt lta ltb lte ltl ltm ltt maa mab mae mal mam man mat mba mbb mbe mbl mbm mbt mea meb mee mel mem men met mla mlb mle mll mlm mln mlt mma mmb mme mml mmm mmn mmt mna mnb mne mnl mnm mnn mnt mta mtb mte mtl mtm mtn mtt naa nab nae nal nam nan nat nba nbb nbe nbl nbm nbn nbt ne- nea neb nee nel nem nen net nla nlb nle nll nlm nln nlt nma nmb nme nml nmm nmn nmt nna nnb nne nnl nnm nnn nnt nta ntb nte ntm ntn ntt taa tab tae tal tam tan tat tba tbb tbe tbl tbm tbn tbt te- tea teb tee tel tem ten tet tla tle tll tlm tln tlt tma tmb tme tml tmm tmn tmt tna tnb tne tnl tnm tnn tnt tta ttb tte ttl ttm ttn ttt