a-a a-c a-t aaa aac aae aaf aak aat ac- aca acc ace acf ack act aea aec aee aef aek aet af- afa afc afe aff afk aft aka akc ake akk at- ata atc ate atf att c-- caa cac cae caf cak cat cca ccc cce ccf cck cct ce- cea cec cee cef cek cet cfa cfc cfe cff cfk cft cka ckc ckt cta ctc cte ctf ctk ctt eaa eac eae eaf eak eat ec- eca ecc ece ecf eck ect eea eec eee eef eek eet ef- efa efc efe eff eft eka ekc eke ekf ekt eta etc ete etf etk ett faa fac fae faf fak fat fca fcc fce fcf fck fct fea fec fee fef fek fet ffa ffc ffe fff ffk fft fka fkc fkf fkk fkt fta ftc fte ftf ftk ftt k-t ka- kaa kac kae kaf kak kat kca kcc kce kck kct ke- kea kec kee kef kek ket kfa kfc kff kkc kke kkk kkt kta ktc kte ktf ktk ktt taa tac tae taf tak tat tca tcc tce tcf tck tct te- tea tec tee tef tek tet tfa tfc tfe tff tfk tft tka tkc tke tkk tkt tta ttc tte ttf ttk ttt