a-a a-t aaa aaf aag aam aat af- afa aff afg afm aft ag- aga agf agg agm agt ama amf amg amm amt at- ata atf atg atm att faa faf fag fam fat ffa fff ffg ffm fft fga fgf fgg fgm fgt fma fmf fmg fmm fmt fta ftf ftg ftm ftt gaa gaf gag gam gat gfa gff gfm gft gga ggg ggm ggt gma gmf gmg gmm gmt gta gtf gtg gtm gtt m-f maa maf mag mam mat mfa mff mfg mfm mft mga mgf mgm mgt mma mmf mmg mmm mmt mta mtf mtg mtm mtt taa taf tag tam tat tfa tff tfg tfm tft tga tgf tgg tgm tgt tma tmf tmg tmm tmt tta ttf ttg ttm ttt