a-a a-c a-t aaa aac aae aak aam aas aat ac- aca acc ace ack acm acs act aea aec aee aek aem aes aet aka akc ake akk akm aks ama amc ame amk amm ams amt as- asa asc ase ask asm ass ast at- ata atc ate atm ats att c-- caa cac cae cak cam cas cat cca ccc cce cck ccm ccs cct ce- cea cec cee cek cem ces cet cka ckc ckm cks ckt cma cmc cme cmk cmm cms cmt csa csc cse csk csm css cst cta ctc cte ctk ctm cts ctt eaa eac eae eak eam eas eat ec- eca ecc ece eck ecm ecs ect eea eec eee eek eem ees eet eka ekc eke eks ekt em- ema emc eme emk emm ems emt es- esa esc ese esk esm ess est eta etc ete etk etm ets ett k-t ka- kaa kac kae kak kam kas kat kca kcc kce kck kcm kcs kct ke- kea kec kee kek kem kes ket kkc kke kkk kkm kks kkt kma kmc kme kmk kmm kms kmt ksa ksc kse ksk ksm kss kst kta ktc kte ktk ktm kts ktt maa mac mae mak mam mas mat mc- mca mcc mce mck mcm mcs mct mea mec mee mek mem mes met mka mkc mke mkk mkm mks mkt mma mmc mme mmk mmm mms mmt msa msc mse msk msm mss mst mta mtc mte mtk mtm mts mtt saa sac sae sak sam sas sat sca scc sce sck scm scs sct se- sea sec see sek sem ses set sk- ska skc ske skk skm sks skt sma smc sme smk smm sms smt ss- ssa ssc sse ssk ssm sss sst sta stc ste stk stm sts stt taa tac tae tak tam tas tat tca tcc tce tck tcm tcs tct te- tea tec tee tek tem tes tet tka tkc tke tkk tkm tks tkt tma tmc tme tmk tmm tms tmt tsa tsc tse tsk tsm tss tst tta ttc tte ttk ttm tts ttt