a-a a-c a-t aaa aac aaf aak aan aao aas aat ac- aca acc acf ack acn aco acs act af- afa afc aff afk afn afo afs aft aka akc akk akn ako aks an- ana anc anf ank ann ano ans ant aoa aoc aof aok aon aoo aos aot as- asa asc asf ask asn aso ass ast at- ata atc atf atn ato ats att c-- caa cac caf cak can cao cas cat cca ccc ccf cck ccn cco ccs cct cfa cfc cff cfk cfn cfo cfs cft cka ckc cko cks ckt cn- cna cnc cnf cnn cno cns cnt co- coa coc cof cok con coo cos cot csa csc csf csk csn cso css cst cta ctc ctf ctk ctn cto cts ctt faa fac faf fak fan fao fas fat fca fcc fcf fck fcn fco fcs fct ffa ffc fff ffk ffn ffo ffs fft fka fkc fkf fkk fkt fna fnc fnf fnk fnn fns fnt foa foc fof fok fon foo fos fot fsa fsc fsf fsk fsn fso fss fst fta ftc ftf ftk ftn fto fts ftt k-t ka- kaa kac kaf kak kan kao kas kat kca kcc kck kcn kcs kct kfa kfc kff kfo kfs kkc kkk kkn kks kkt kn- kna knc knf knk knn kno knt koa koc kof kok kon koo kos kot ksa ksc ksf ksk ksn kso kss kst kta ktc ktf ktk ktn kto kts ktt naa nac naf nak nan nao nas nat nca ncc ncf nck ncn nco ncs nct nfa nfc nff nfk nfn nfo nfs nft nka nkc nkf nkk nkn nko nks nkt nna nnc nnf nnk nnn nno nns nnt no- noa noc nof nok non noo nos not nsa nsc nsf nsk nsn nso nss nst nta ntc ntf ntk ntn nto nts ntt oaa oac oaf oak oan oao oas oat oc- oca occ ocf ock ocn oco ocs oct of- ofa ofc off ofn ofo ofs oft oka okc okk oko oks on- ona onc onf onk onn ono ons ont oo- ooa ooc oof ook oon ooo oos oot os- osa osc osf osk osn oso oss ost ot- ota otc otf otk otn oto ots ott saa sac saf sak san sao sas sat sca scc scf sck scn sco scs sct sfa sfc sff sfk sfn sfo sfs sft sk- ska skc skf skk sko sks skt sna snc snf snk snn sno sns snt soa soc sof sok son soo sos sot ss- ssa ssc ssf ssk ssn sso sss sst sta stc stf stk stn sto sts stt taa tac taf tak tan tao tas tat tca tcc tcf tck tcn tco tcs tct tfa tfc tff tfk tfn tfo tfs tft tka tkc tkk tko tks tkt tna tnc tnf tnk tnn tno tns tnt to- toa toc tof tok ton too tos tot tsa tsc tsf tsk tsn tso tss tst tta ttc ttf ttk ttn tto tts ttt