a-a a-c a-t aaa aac aae aaf aak aan aao aat ac- aca acc ace acf ack acn aco act aea aec aee aef aek aen aeo aet af- afa afc afe aff afk afn afo aft aka akc ake akk akn ako an- ana anc ane anf ank ann ano ant aoa aoc aoe aof aok aon aoo aot at- ata atc ate atf atn ato att c-- caa cac cae caf cak can cao cat cca ccc cce ccf cck ccn cco cct ce- cea cec cee cef cek cen ceo cet cfa cfc cfe cff cfk cfn cfo cft cka ckc cko ckt cn- cna cnc cne cnf cnn cno cnt co- coa coc coe cof cok con coo cot cta ctc cte ctf ctk ctn cto ctt eaa eac eae eaf eak ean eao eat ec- eca ecc ece ecf eck ecn eco ect eea eec eee eef eek een eeo eet ef- efa efc efe eff efo eft eka ekc eke ekf eko ekt en- ena enc ene enf enk enn eno ent eo- eoa eoc eoe eof eok eon eoo eot eta etc ete etf etk etn eto ett faa fac fae faf fak fan fao fat fca fcc fce fcf fck fcn fco fct fea fec fee fef fek fen feo fet ffa ffc ffe fff ffk ffn ffo fft fka fkc fkf fkk fkt fna fnc fne fnf fnk fnn fnt foa foc foe fof fok fon foo fot fta ftc fte ftf ftk ftn fto ftt k-t ka- kaa kac kae kaf kak kan kao kat kca kcc kce kck kcn kct ke- kea kec kee kef kek ken keo ket kfa kfc kff kfo kkc kke kkk kkn kkt kn- kna knc kne knf knk knn kno knt koa koc koe kof kok kon koo kot kta ktc kte ktf ktk ktn kto ktt naa nac nae naf nak nan nao nat nca ncc nce ncf nck ncn nco nct ne- nea nec nee nef nek nen neo net nfa nfc nfe nff nfk nfn nfo nft nka nkc nke nkf nkk nkn nko nkt nna nnc nne nnf nnk nnn nno nnt no- noa noc noe nof nok non noo not nta ntc nte ntf ntk ntn nto ntt oaa oac oae oaf oak oan oao oat oc- oca occ ocf ock ocn oco oct oea oec oee oef oen oeo oet of- ofa ofc ofe off ofn ofo oft oka okc oke okk oko on- ona onc one onf onk onn ono ont oo- ooa ooc oof ook oon ooo oot ot- ota otc ote otf otk otn oto ott taa tac tae taf tak tan tao tat tca tcc tce tcf tck tcn tco tct te- tea tec tee tef tek ten teo tet tfa tfc tfe tff tfk tfn tfo tft tka tkc tke tkk tko tkt tna tnc tne tnf tnk tnn tno tnt to- toa toc toe tof tok ton too tot tta ttc tte ttf ttk ttn tto ttt