a-a a-c a-t aaa aac aad aae aak aas aat ac- aca acc acd ace ack acs act ad- ada adc add ade adk ads adt aea aec aed aee aek aes aet aka akc akd ake akk aks as- asa asc asd ase ask ass ast at- ata atc atd ate ats att c-- caa cac cad cae cak cas cat cca ccc ccd cce cck ccs cct cda cdc cdd cde cdk cds cdt ce- cea cec ced cee cek ces cet cka ckc ckd cks ckt csa csc csd cse csk css cst cta ctc ctd cte ctk cts ctt daa dac dad dae dak das dat dca dcc dcd dce dck dcs dct dda ddc ddd dde ddk dds ddt de- dea dec ded dee dek des det dka dkc dke dkk dks dkt dsa dsc dsd dse dsk dss dst dta dtc dtd dte dtk dts dtt eaa eac ead eae eak eas eat ec- eca ecc ecd ece eck ecs ect ed- eda edc edd ede edk eds edt eea eec eed eee eek ees eet eka ekc ekd eke eks ekt es- esa esc esd ese esk ess est eta etc etd ete etk ets ett k-t ka- kaa kac kad kae kak kas kat kca kcc kcd kce kck kcs kct kda kdc kde kdk kds kdt ke- kea kec ked kee kek kes ket kkc kke kkk kks kkt ksa ksc ksd kse ksk kss kst kta ktc kte ktk kts ktt saa sac sad sae sak sas sat sca scc scd sce sck scs sct sda sdc sdd sde sdk sds sdt se- sea sec sed see sek ses set sk- ska skc skd ske skk sks skt ss- ssa ssc ssd sse ssk sss sst sta stc std ste stk sts stt taa tac tad tae tak tas tat tca tcc tcd tce tck tcs tct tda tdc tdd tde tdk tds tdt te- tea tec ted tee tek tes tet tka tkc tke tkk tks tkt tsa tsc tsd tse tsk tss tst tta ttc ttd tte ttk tts ttt