-al a-a a-c aaa aac aae aaf aak aal aan ac- aca acc ace acf ack acl acn aea aec aee aef aek ael aen af- afa afc afe aff afk afl afn aka akc ake akk akl akn al- ala alc ale alf alk all aln an- ana anc ane anf ank anl ann c-- caa cac cae caf cak cal can cca ccc cce ccf cck ccl ccn ce- cea cec cee cef cek cel cen cfa cfc cfe cff cfk cfl cfn cka ckc cl- cla clc cle clf clk cll cln cn- cna cnc cne cnf cnl cnn eaa eac eae eaf eak eal ean ec- eca ecc ece ecf eck ecl ecn eea eec eee eef eek eel een ef- efa efc efe eff efl eka ekc eke ekf ekl ela elc ele elf elk ell eln en- ena enc ene enf enk enl enn faa fac fae faf fak fal fan fca fcc fce fcf fck fcl fcn fea fec fee fef fek fel fen ffa ffc ffe fff ffk ffl ffn fka fkc fkf fkk fkl fla flc fle flf fll fln fna fnc fne fnf fnk fnl fnn ka- kaa kac kae kaf kak kal kan kca kcc kce kck kcl kcn ke- kea kec kee kef kek kel ken kfa kfc kff kkc kke kkk kkl kkn kl- kla klc klf kn- kna knc kne knf knk knl knn la- laa lac lae laf lak lal lan lca lcc lce lcf lck lcl lcn lea lec lee lef lek lel len lfa lfc lfe lff lfk lfl lfn lka lkl lla llc lle llf llk lll lln lna lnc lne lnk lnl lnn naa nac nae naf nak nal nan nca ncc nce ncf nck ncl ncn ne- nea nec nee nef nek nel nen nfa nfc nfe nff nfk nfl nfn nka nkc nke nkf nkk nkn nla nlc nle nlf nlk nll nln nna nnc nne nnf nnk nnl nnn