-al a-a a-b a-t aaa aab aae aaf aak aal aan aat ab- aba abb abe abf abk abl abn abt aea aeb aee aef aek ael aen aet af- afa afb afe aff afk afl afn aft aka akb ake akk akl akn al- ala alb ale alf alk all aln alt an- ana anb ane anf ank anl ann ant at- ata atb ate atf atl atn att baa bab bae baf bak bal ban bat bba bbb bbe bbf bbk bbl bbn bbt be- bea beb bee bef bek bel ben bet bfa bfb bfe bff bfl bfn bft bka bkb bke bkf bkk bkl bkn bkt bla blb ble blf blk bll bln blt bna bnb bne bnf bnk bnl bnn bnt bta btb bte btf btk btl btn btt eaa eab eae eaf eak eal ean eat eba ebb ebe ebf ebk ebl ebn ebt eea eeb eee eef eek eel een eet ef- efa efb efe eff efl eft eka ekb eke ekf ekl ekt ela elb ele elf elk ell eln elt en- ena enb ene enf enk enl enn ent eta etb ete etf etk etl etn ett faa fab fae faf fak fal fan fat fba fbb fbe fbf fbk fbl fbn fbt fea feb fee fef fek fel fen fet ffa ffe fff ffk ffl ffn fft fka fkb fkf fkk fkl fkt fla flb fle flf fll fln flt fna fnb fne fnf fnk fnl fnn fnt fta ftb fte ftf ftk ftl ftn ftt k-t ka- kaa kab kae kaf kak kal kan kat kba kbb kbe kbf kbk kbl kbn ke- kea keb kee kef kek kel ken ket kfa kff kkb kke kkk kkl kkn kkt kl- kla klb klf klt kn- kna kne knf knk knl knn knt kta ktb kte ktf ktk ktl ktn ktt la- laa lab lae laf lak lal lan lat lba lbb lbe lbf lbk lbl lbt lea leb lee lef lek lel len let lfa lfb lfe lff lfk lfl lfn lft lka lkb lkl lkt lla llb lle llf llk lll lln llt lna lnb lne lnk lnl lnn lnt lta ltb lte ltf ltk ltl ltt naa nab nae naf nak nal nan nat nba nbb nbe nbf nbk nbl nbn nbt ne- nea neb nee nef nek nel nen net nfa nfb nfe nff nfk nfl nfn nft nka nke nkf nkk nkn nkt nla nlb nle nlf nlk nll nln nlt nna nnb nne nnf nnk nnl nnn nnt nta ntb nte ntf ntk ntn ntt taa tab tae taf tak tal tan tat tba tbb tbe tbf tbk tbl tbn tbt te- tea teb tee tef tek tel ten tet tfa tfb tfe tff tfk tfl tfn tft tka tkb tke tkk tkl tkt tla tle tlf tlk tll tln tlt tna tnb tne tnf tnk tnl tnn tnt tta ttb tte ttf ttk ttl ttn ttt