a-a a-c a-t aaa aac aae aaf aam aan aas aat ac- aca acc ace acf acm acn acs act aea aec aee aef aem aen aes aet af- afa afc afe aff afm afn afs aft ama amc ame amf amm amn ams amt an- ana anc ane anf anm ann ans ant as- asa asc ase asf asm asn ass ast at- ata atc ate atf atm atn ats att c-- caa cac cae caf cam can cas cat cca ccc cce ccf ccm ccn ccs cct ce- cea cec cee cef cem cen ces cet cfa cfc cfe cff cfm cfn cfs cft cma cmc cme cmf cmm cmn cms cmt cn- cna cnc cne cnf cnm cnn cns cnt csa csc cse csf csm csn css cst cta ctc cte ctf ctm ctn cts ctt eaa eac eae eaf eam ean eas eat ec- eca ecc ece ecf ecm ecn ecs ect eea eec eee eef eem een ees eet ef- efa efc efe eff efm efs eft em- ema emc eme emf emm emn ems emt en- ena enc ene enf enm enn ens ent es- esa esc ese esf esm esn ess est eta etc ete etf etm etn ets ett faa fac fae faf fam fan fas fat fca fcc fce fcf fcm fcn fcs fct fea fec fee fef fem fen fes fet ffa ffc ffe fff ffm ffn ffs fft fma fmc fme fmf fmm fmn fms fmt fna fnc fne fnf fnm fnn fns fnt fsa fsc fse fsf fsm fsn fss fst fta ftc fte ftf ftm ftn fts ftt m-f maa mac mae maf mam man mas mat mc- mca mcc mce mcf mcm mcn mcs mct mea mec mee mef mem men mes met mfa mfc mfe mff mfm mfn mfs mft mma mmc mme mmf mmm mmn mms mmt mna mnc mne mnf mnm mnn mns mnt msa msc mse msf msm msn mss mst mta mtc mte mtf mtm mtn mts mtt naa nac nae naf nam nan nas nat nca ncc nce ncf ncm ncn ncs nct ne- nea nec nee nef nem nen nes net nfa nfc nfe nff nfn nfs nft nma nmc nme nmm nmn nms nmt nna nnc nne nnf nnm nnn nns nnt nsa nsc nse nsf nsm nsn nss nst nta ntc nte ntf ntm ntn nts ntt saa sac sae saf sam san sas sat sca scc sce scf scm scn scs sct se- sea sec see sef sem sen ses set sfa sfc sfe sff sfm sfn sfs sft sma smc sme smf smm smn sms smt sna snc sne snf snm snn sns snt ss- ssa ssc sse ssf ssm ssn sss sst sta stc ste stf stm stn sts stt taa tac tae taf tam tan tas tat tca tcc tce tcf tcm tcn tcs tct te- tea tec tee tef tem ten tes tet tfa tfc tfe tff tfm tfn tfs tft tma tmc tme tmf tmm tmn tms tmt tna tnc tne tnf tnm tnn tns tnt tsa tsc tse tsf tsm tsn tss tst tta ttc tte ttf ttm ttn tts ttt