a-a a-t aaa aaf aam aan aat af- afa aff afm afn aft ama amf amm amn amt an- ana anf anm ann ant at- ata atf atm atn att faa faf fam fan fat ffa fff ffm ffn fft fma fmf fmm fmn fmt fna fnf fnm fnn fnt fta ftf ftm ftn ftt m-f maa maf mam man mat mfa mff mfm mfn mft mma mmf mmm mmn mmt mna mnf mnm mnn mnt mta mtf mtm mtn mtt naa naf nam nan nat nfa nff nfn nft nma nmm nmn nmt nna nnf nnm nnn nnt nta ntf ntm ntn ntt taa taf tam tan tat tfa tff tfm tfn tft tma tmf tmm tmn tmt tna tnf tnm tnn tnt tta ttf ttm ttn ttt