a-a a-c a-t aaa aac aaf aak aao aas aat ac- aca acc acf ack aco acs act af- afa afc aff afk afo afs aft aka akc akk ako aks aoa aoc aof aok aoo aos aot as- asa asc asf ask aso ass ast at- ata atc atf ato ats att c-- caa cac caf cak cao cas cat cca ccc ccf cck cco ccs cct cfa cfc cff cfk cfo cfs cft cka ckc cko cks ckt co- coa coc cof cok coo cos cot csa csc csf csk cso css cst cta ctc ctf ctk cto cts ctt faa fac faf fak fao fas fat fca fcc fcf fck fco fcs fct ffa ffc fff ffk ffo ffs fft fka fkc fkf fkk fkt foa foc fof fok foo fos fot fsa fsc fsf fsk fso fss fst fta ftc ftf ftk fto fts ftt k-t ka- kaa kac kaf kak kao kas kat kca kcc kck kcs kct kfa kfc kff kfo kfs kkc kkk kks kkt koa koc kof kok koo kos kot ksa ksc ksf ksk kso kss kst kta ktc ktf ktk kto kts ktt oaa oac oaf oak oao oas oat oc- oca occ ocf ock oco ocs oct of- ofa ofc off ofo ofs oft oka okc okk oko oks oo- ooa ooc oof ook ooo oos oot os- osa osc osf osk oso oss ost ot- ota otc otf otk oto ots ott saa sac saf sak sao sas sat sca scc scf sck sco scs sct sfa sfc sff sfk sfo sfs sft sk- ska skc skf skk sko sks skt soa soc sof sok soo sos sot ss- ssa ssc ssf ssk sso sss sst sta stc stf stk sto sts stt taa tac taf tak tao tas tat tca tcc tcf tck tco tcs tct tfa tfc tff tfk tfo tfs tft tka tkc tkk tko tks tkt to- toa toc tof tok too tos tot tsa tsc tsf tsk tso tss tst tta ttc ttf ttk tto tts ttt