-al a-a a-b a-t aaa aab aae aak aal aan aat ab- aba abb abe abk abl abn abt aea aeb aee aek ael aen aet aka akb ake akk akl akn al- ala alb ale alk all aln alt an- ana anb ane ank anl ann ant at- ata atb ate atl atn att baa bab bae bak bal ban bat bba bbb bbe bbk bbl bbn bbt be- bea beb bee bek bel ben bet bka bkb bke bkk bkl bkn bkt bla blb ble blk bll bln blt bna bnb bne bnk bnl bnn bnt bta btb bte btk btl btn btt eaa eab eae eak eal ean eat eba ebb ebe ebk ebl ebn ebt eea eeb eee eek eel een eet eka ekb eke ekl ekt ela elb ele elk ell eln elt en- ena enb ene enk enl enn ent eta etb ete etk etl etn ett k-t ka- kaa kab kae kak kal kan kat kba kbb kbe kbk kbl kbn ke- kea keb kee kek kel ken ket kkb kke kkk kkl kkn kkt kl- kla klb klt kn- kna kne knk knl knn knt kta ktb kte ktk ktl ktn ktt la- laa lab lae lak lal lan lat lba lbb lbe lbk lbl lbt lea leb lee lek lel len let lka lkb lkl lkt lla llb lle llk lll lln llt lna lnb lne lnk lnl lnn lnt lta ltb lte ltk ltl ltt naa nab nae nak nal nan nat nba nbb nbe nbk nbl nbn nbt ne- nea neb nee nek nel nen net nka nke nkk nkn nkt nla nlb nle nlk nll nln nlt nna nnb nne nnk nnl nnn nnt nta ntb nte ntk ntn ntt taa tab tae tak tal tan tat tba tbb tbe tbk tbl tbn tbt te- tea teb tee tek tel ten tet tka tkb tke tkk tkl tkt tla tle tlk tll tln tlt tna tnb tne tnk tnl tnn tnt tta ttb tte ttk ttl ttn ttt