a-a a-c a-t aaa aac aae aaf aam aas aat ac- aca acc ace acf acm acs act aea aec aee aef aem aes aet af- afa afc afe aff afm afs aft ama amc ame amf amm ams amt as- asa asc ase asf asm ass ast at- ata atc ate atf atm ats att c-- caa cac cae caf cam cas cat cca ccc cce ccf ccm ccs cct ce- cea cec cee cef cem ces cet cfa cfc cfe cff cfm cfs cft cma cmc cme cmf cmm cms cmt csa csc cse csf csm css cst cta ctc cte ctf ctm cts ctt eaa eac eae eaf eam eas eat ec- eca ecc ece ecf ecm ecs ect eea eec eee eef eem ees eet ef- efa efc efe eff efm efs eft em- ema emc eme emf emm ems emt es- esa esc ese esf esm ess est eta etc ete etf etm ets ett faa fac fae faf fam fas fat fca fcc fce fcf fcm fcs fct fea fec fee fef fem fes fet ffa ffc ffe fff ffm ffs fft fma fmc fme fmf fmm fms fmt fsa fsc fse fsf fsm fss fst fta ftc fte ftf ftm fts ftt m-f maa mac mae maf mam mas mat mc- mca mcc mce mcf mcm mcs mct mea mec mee mef mem mes met mfa mfc mfe mff mfm mfs mft mma mmc mme mmf mmm mms mmt msa msc mse msf msm mss mst mta mtc mte mtf mtm mts mtt saa sac sae saf sam sas sat sca scc sce scf scm scs sct se- sea sec see sef sem ses set sfa sfc sfe sff sfm sfs sft sma smc sme smf smm sms smt ss- ssa ssc sse ssf ssm sss sst sta stc ste stf stm sts stt taa tac tae taf tam tas tat tca tcc tce tcf tcm tcs tct te- tea tec tee tef tem tes tet tfa tfc tfe tff tfm tfs tft tma tmc tme tmf tmm tms tmt tsa tsc tse tsf tsm tss tst tta ttc tte ttf ttm tts ttt