a-a a-c a-t aaa aac aad aae aak aat ac- aca acc acd ace ack act ad- ada adc add ade adk adt aea aec aed aee aek aet aka akc akd ake akk at- ata atc atd ate att c-- caa cac cad cae cak cat cca ccc ccd cce cck cct cda cdc cdd cde cdk cdt ce- cea cec ced cee cek cet cka ckc ckd ckt cta ctc ctd cte ctk ctt daa dac dad dae dak dat dca dcc dcd dce dck dct dda ddc ddd dde ddk ddt de- dea dec ded dee dek det dka dkc dke dkk dkt dta dtc dtd dte dtk dtt eaa eac ead eae eak eat ec- eca ecc ecd ece eck ect ed- eda edc edd ede edk edt eea eec eed eee eek eet eka ekc ekd eke ekt eta etc etd ete etk ett k-t ka- kaa kac kad kae kak kat kca kcc kcd kce kck kct kda kdc kde kdk kdt ke- kea kec ked kee kek ket kkc kke kkk kkt kta ktc kte ktk ktt taa tac tad tae tak tat tca tcc tcd tce tck tct tda tdc tdd tde tdk tdt te- tea tec ted tee tek tet tka tkc tke tkk tkt tta ttc ttd tte ttk ttt