a-a a-b a-i aaa aab aaf aai aak aam aan ab- aba abb abf abi abk abm abn af- afa afb aff afi afk afm afn ai- aia aib aif aii aik aim ain aka akb aki akk akm akn ama amb amf ami amk amm amn an- ana anb anf ani ank anm ann baa bab baf bai bak bam ban bba bbb bbf bbi bbk bbm bbn bfa bfb bff bfi bfm bfn bi- bia bib bif bii bik bim bin bka bkb bkf bkk bkm bkn bma bmb bmf bmi bmk bmm bmn bna bnb bnf bni bnk bnn faa fab faf fai fak fam fan fba fbb fbf fbi fbk fbm fbn ffa fff ffi ffk ffm ffn fia fib fif fii fik fim fin fka fkb fkf fki fkk fkm fma fmb fmf fmi fmm fmn fna fnb fnf fni fnk fnm fnn i-f ia- iaa iab iaf iai iam ian iba ibb ibf ibi ibk ibm ibn ifa ifb iff ifi ifm ifn iia iib iif iii iim iin ika ikb ikf iki ikk im- ima imb imf imi imm imn in- ina inb inf ini ink inm inn ka- kaa kab kaf kai kak kam kan kba kbb kbf kbi kbk kbm kbn kfa kff kfi kfm kia kib kif kii kik kim kin kkb kki kkk kkm kkn kma kmb kmf kmi kmk kmm kn- kna knf kni knk knm knn m-f maa mab maf mai mak mam man mba mbb mbf mbi mbk mbm mfa mfb mff mfi mfm mfn mi- mia mib mif mii mik mim min mka mkb mkk mkm mkn mma mmb mmf mmi mmk mmm mmn mna mnb mnf mni mnk mnm mnn n-i naa nab naf nai nak nam nan nba nbb nbf nbi nbk nbm nbn nfa nfb nff nfi nfk nfn nia nib nif nii nik nim nin nka nkf nki nkk nkm nkn nma nmb nmi nmk nmm nmn nna nnb nnf nni nnk nnm nnn