a-a a-b a-i aaa aab aae aaf aai aam aan ab- aba abb abe abf abi abm abn aea aeb aee aef aei aem aen af- afa afb afe aff afi afm afn ai- aia aib aie aif aii aim ain ama amb ame amf ami amm amn an- ana anb ane anf ani anm ann baa bab bae baf bai bam ban bba bbb bbe bbf bbi bbm bbn be- bea beb bee bef bei bem ben bfa bfb bfe bff bfi bfm bfn bi- bia bib bie bif bii bim bin bma bmb bme bmf bmi bmm bmn bna bnb bne bnf bni bnn eaa eab eae eaf eai eam ean eba ebb ebe ebf ebi ebm ebn eea eeb eee eef eem een ef- efa efb efe eff efi efm eia eib eie eif eii eim ein em- ema emb eme emf emi emm emn en- ena enb ene enf eni enm enn faa fab fae faf fai fam fan fba fbb fbe fbf fbi fbm fbn fea feb fee fef fei fem fen ffa ffe fff ffi ffm ffn fia fib fie fif fii fim fin fma fmb fme fmf fmi fmm fmn fna fnb fne fnf fni fnm fnn i-f ia- iaa iab iae iaf iai iam ian iba ibb ibe ibf ibi ibm ibn ie- iea iee ief iei iem ien ifa ifb ife iff ifi ifm ifn iia iib iie iif iii iim iin im- ima imb ime imf imi imm imn in- ina inb ine inf ini inm inn m-f maa mab mae maf mai mam man mba mbb mbe mbf mbi mbm mea meb mee mef mei mem men mfa mfb mfe mff mfi mfm mfn mi- mia mib mie mif mii mim min mma mmb mme mmf mmi mmm mmn mna mnb mne mnf mni mnm mnn n-i naa nab nae naf nai nam nan nba nbb nbe nbf nbi nbm nbn ne- nea neb nee nef nei nem nen nfa nfb nfe nff nfi nfn nia nib nie nif nii nim nin nma nmb nme nmi nmm nmn nna nnb nne nnf nni nnm nnn