a-a a-c aaa aac aae aaf aah aak aan ac- aca acc ace acf ach ack acn aea aec aee aef aeh aek aen af- afa afc afe aff afh afk afn aha ahc ahe ahf ahh ahk ahn aka akc ake akh akk akn an- ana anc ane anf anh ank ann c-- caa cac cae caf cah cak can cca ccc cce ccf cch cck ccn ce- cea cec cee cef ceh cek cen cfa cfc cfe cff cfh cfk cfn ch- cha chc che chf chh chk chn cka ckc ckh cn- cna cnc cne cnf cnh cnn eaa eac eae eaf eah eak ean ec- eca ecc ece ecf ech eck ecn eea eec eee eef eek een ef- efa efc efe eff efh eha ehc ehe ehf ehh ehn eka ekc eke ekf ekh en- ena enc ene enf enh enk enn faa fac fae faf fah fak fan fca fcc fce fcf fck fcn fea fec fee fef feh fek fen ffa ffc ffe fff ffh ffk ffn fha fhc fhe fhf fhh fhn fka fkc fkf fkk fna fnc fne fnf fnh fnk fnn haa hac hae haf hah hak han hca hcc hce hcf hch hck hcn he- hea hec hee hef heh hek hen hfa hfc hfe hff hfh hfk hfn hha hhc hhe hhf hhh hhk hhn hka hkf hkh hkk hkn hna hnc hne hnf hnh hnk hnn ka- kaa kac kae kaf kah kak kan kca kcc kce kch kck kcn ke- kea kec kee kef keh kek ken kfa kfc kff kfh kha khe khf khh khk khn kkc kke kkh kkk kkn kn- kna knc kne knf knk knn naa nac nae naf nah nak nan nca ncc nce ncf nch nck ncn ne- nea nec nee nef neh nek nen nfa nfc nfe nff nfk nfn nha nhc nhe nhf nhh nhk nhn nka nkc nke nkf nkk nkn nna nnc nne nnf nnh nnk nnn