a-a a-c a-t aaa aac aae aak aan aas aat ac- aca acc ace ack acn acs act aea aec aee aek aen aes aet aka akc ake akk akn aks an- ana anc ane ank ann ans ant as- asa asc ase ask asn ass ast at- ata atc ate atn ats att c-- caa cac cae cak can cas cat cca ccc cce cck ccn ccs cct ce- cea cec cee cek cen ces cet cka ckc cks ckt cn- cna cnc cne cnn cns cnt csa csc cse csk csn css cst cta ctc cte ctk ctn cts ctt eaa eac eae eak ean eas eat ec- eca ecc ece eck ecn ecs ect eea eec eee eek een ees eet eka ekc eke eks ekt en- ena enc ene enk enn ens ent es- esa esc ese esk esn ess est eta etc ete etk etn ets ett k-t ka- kaa kac kae kak kan kas kat kca kcc kce kck kcn kcs kct ke- kea kec kee kek ken kes ket kkc kke kkk kkn kks kkt kn- kna knc kne knk knn knt ksa ksc kse ksk ksn kss kst kta ktc kte ktk ktn kts ktt naa nac nae nak nan nas nat nca ncc nce nck ncn ncs nct ne- nea nec nee nek nen nes net nka nkc nke nkk nkn nks nkt nna nnc nne nnk nnn nns nnt nsa nsc nse nsk nsn nss nst nta ntc nte ntk ntn nts ntt saa sac sae sak san sas sat sca scc sce sck scn scs sct se- sea sec see sek sen ses set sk- ska skc ske skk sks skt sna snc sne snk snn sns snt ss- ssa ssc sse ssk ssn sss sst sta stc ste stk stn sts stt taa tac tae tak tan tas tat tca tcc tce tck tcn tcs tct te- tea tec tee tek ten tes tet tka tkc tke tkk tks tkt tna tnc tne tnk tnn tns tnt tsa tsc tse tsk tsn tss tst tta ttc tte ttk ttn tts ttt