a-a a-c a-t aaa aac aak aan aao aas aat ac- aca acc ack acn aco acs act aka akc akk akn ako aks an- ana anc ank ann ano ans ant aoa aoc aok aon aoo aos aot as- asa asc ask asn aso ass ast at- ata atc atn ato ats att c-- caa cac cak can cao cas cat cca ccc cck ccn cco ccs cct cka ckc cko cks ckt cn- cna cnc cnn cno cns cnt co- coa coc cok con coo cos cot csa csc csk csn cso css cst cta ctc ctk ctn cto cts ctt k-t ka- kaa kac kak kan kao kas kat kca kcc kck kcn kcs kct kkc kkk kkn kks kkt kn- kna knc knk knn kno knt koa koc kok kon koo kos kot ksa ksc ksk ksn kso kss kst kta ktc ktk ktn kto kts ktt naa nac nak nan nao nas nat nca ncc nck ncn nco ncs nct nka nkc nkk nkn nko nks nkt nna nnc nnk nnn nno nns nnt no- noa noc nok non noo nos not nsa nsc nsk nsn nso nss nst nta ntc ntk ntn nto nts ntt oaa oac oak oan oao oas oat oc- oca occ ock ocn oco ocs oct oka okc okk oko oks on- ona onc onk onn ono ons ont oo- ooa ooc ook oon ooo oos oot os- osa osc osk osn oso oss ost ot- ota otc otk otn oto ots ott saa sac sak san sao sas sat sca scc sck scn sco scs sct sk- ska skc skk sko sks skt sna snc snk snn sno sns snt soa soc sok son soo sos sot ss- ssa ssc ssk ssn sso sss sst sta stc stk stn sto sts stt taa tac tak tan tao tas tat tca tcc tck tcn tco tcs tct tka tkc tkk tko tks tkt tna tnc tnk tnn tno tns tnt to- toa toc tok ton too tos tot tsa tsc tsk tsn tso tss tst tta ttc ttk ttn tto tts ttt