a-a a-c a-t aaa aac aad aak aao aas aat ac- aca acc acd ack aco acs act ad- ada adc add adk ado ads adt aka akc akd akk ako aks aoa aoc aod aok aoo aos aot as- asa asc asd ask aso ass ast at- ata atc atd ato ats att c-- caa cac cad cak cao cas cat cca ccc ccd cck cco ccs cct cda cdc cdd cdk cdo cds cdt cka ckc ckd cko cks ckt co- coa coc cod cok coo cos cot csa csc csd csk cso css cst cta ctc ctd ctk cto cts ctt daa dac dad dak dao das dat dca dcc dcd dck dco dcs dct dda ddc ddd ddk ddo dds ddt dka dkc dkk dko dks dkt doa doc dod dok doo dos dot dsa dsc dsd dsk dso dss dst dta dtc dtd dtk dto dts dtt k-t ka- kaa kac kad kak kao kas kat kca kcc kcd kck kcs kct kda kdc kdk kdo kds kdt kkc kkk kks kkt koa koc kod kok koo kos kot ksa ksc ksd ksk kso kss kst kta ktc ktk kto kts ktt oaa oac oad oak oao oas oat oc- oca occ ocd ock oco ocs oct oda odc odd odo ods odt oka okc okd okk oko oks oo- ooa ooc ood ook ooo oos oot os- osa osc osd osk oso oss ost ot- ota otc otd otk oto ots ott saa sac sad sak sao sas sat sca scc scd sck sco scs sct sda sdc sdd sdk sdo sds sdt sk- ska skc skd skk sko sks skt soa soc sod sok soo sos sot ss- ssa ssc ssd ssk sso sss sst sta stc std stk sto sts stt taa tac tad tak tao tas tat tca tcc tcd tck tco tcs tct tda tdc tdd tdk tdo tds tdt tka tkc tkk tko tks tkt to- toa toc tod tok too tos tot tsa tsc tsd tsk tso tss tst tta ttc ttd ttk tto tts ttt