a-a a-c a-t aaa aac aae aaf aam aat ac- aca acc ace acf acm act aea aec aee aef aem aet af- afa afc afe aff afm aft ama amc ame amf amm amt at- ata atc ate atf atm att c-- caa cac cae caf cam cat cca ccc cce ccf ccm cct ce- cea cec cee cef cem cet cfa cfc cfe cff cfm cft cma cmc cme cmf cmm cmt cta ctc cte ctf ctm ctt eaa eac eae eaf eam eat ec- eca ecc ece ecf ecm ect eea eec eee eef eem eet ef- efa efc efe eff efm eft em- ema emc eme emf emm emt eta etc ete etf etm ett faa fac fae faf fam fat fca fcc fce fcf fcm fct fea fec fee fef fem fet ffa ffc ffe fff ffm fft fma fmc fme fmf fmm fmt fta ftc fte ftf ftm ftt m-f maa mac mae maf mam mat mc- mca mcc mce mcf mcm mct mea mec mee mef mem met mfa mfc mfe mff mfm mft mma mmc mme mmf mmm mmt mta mtc mte mtf mtm mtt taa tac tae taf tam tat tca tcc tce tcf tcm tct te- tea tec tee tef tem tet tfa tfc tfe tff tfm tft tma tmc tme tmf tmm tmt tta ttc tte ttf ttm ttt