a-a a-c a-t aaa aac aae aak aat ac- aca acc ace ack act aea aec aee aek aet aka akc ake akk at- ata atc ate att c-- caa cac cae cak cat cca ccc cce cck cct ce- cea cec cee cek cet cka ckc ckt cta ctc cte ctk ctt eaa eac eae eak eat ec- eca ecc ece eck ect eea eec eee eek eet eka ekc eke ekt eta etc ete etk ett k-t ka- kaa kac kae kak kat kca kcc kce kck kct ke- kea kec kee kek ket kkc kke kkk kkt kta ktc kte ktk ktt taa tac tae tak tat tca tcc tce tck tct te- tea tec tee tek tet tka tkc tke tkk tkt tta ttc tte ttk ttt