a-a a-c a-t aaa aac aae aak aan aao aat ac- aca acc ace ack acn aco act aea aec aee aek aen aeo aet aka akc ake akk akn ako an- ana anc ane ank ann ano ant aoa aoc aoe aok aon aoo aot at- ata atc ate atn ato att c-- caa cac cae cak can cao cat cca ccc cce cck ccn cco cct ce- cea cec cee cek cen ceo cet cka ckc cko ckt cn- cna cnc cne cnn cno cnt co- coa coc coe cok con coo cot cta ctc cte ctk ctn cto ctt eaa eac eae eak ean eao eat ec- eca ecc ece eck ecn eco ect eea eec eee eek een eeo eet eka ekc eke eko ekt en- ena enc ene enk enn eno ent eo- eoa eoc eoe eok eon eoo eot eta etc ete etk etn eto ett k-t ka- kaa kac kae kak kan kao kat kca kcc kce kck kcn kct ke- kea kec kee kek ken keo ket kkc kke kkk kkn kkt kn- kna knc kne knk knn kno knt koa koc koe kok kon koo kot kta ktc kte ktk ktn kto ktt naa nac nae nak nan nao nat nca ncc nce nck ncn nco nct ne- nea nec nee nek nen neo net nka nkc nke nkk nkn nko nkt nna nnc nne nnk nnn nno nnt no- noa noc noe nok non noo not nta ntc nte ntk ntn nto ntt oaa oac oae oak oan oao oat oc- oca occ ock ocn oco oct oea oec oee oen oeo oet oka okc oke okk oko on- ona onc one onk onn ono ont oo- ooa ooc ook oon ooo oot ot- ota otc ote otk otn oto ott taa tac tae tak tan tao tat tca tcc tce tck tcn tco tct te- tea tec tee tek ten teo tet tka tkc tke tkk tko tkt tna tnc tne tnk tnn tno tnt to- toa toc toe tok ton too tot tta ttc tte ttk ttn tto ttt