a-a a-b a-i a-t aaa aab aae aaf aai aan aat ab- aba abb abe abf abi abn abt aea aeb aee aef aei aen aet af- afa afb afe aff afi afn aft ai- aia aib aie aif aii ain ait an- ana anb ane anf ani ann ant at- ata atb ate atf ati atn att baa bab bae baf bai ban bat bba bbb bbe bbf bbi bbn bbt be- bea beb bee bef bei ben bet bfa bfb bfe bff bfi bfn bft bi- bia bib bie bif bii bin bit bna bnb bne bnf bni bnn bnt bta btb bte btf bti btn btt eaa eab eae eaf eai ean eat eba ebb ebe ebf ebi ebn ebt eea eeb eee eef een eet ef- efa efb efe eff efi eft eia eib eie eif eii ein eit en- ena enb ene enf eni enn ent eta etb ete etf eti etn ett faa fab fae faf fai fan fat fba fbb fbe fbf fbi fbn fbt fea feb fee fef fei fen fet ffa ffe fff ffi ffn fft fia fib fie fif fii fin fit fna fnb fne fnf fni fnn fnt fta ftb fte ftf fti ftn ftt i-f ia- iaa iab iae iaf iai ian iat iba ibb ibe ibf ibi ibn ibt ie- iea iee ief iei ien iet ifa ifb ife iff ifi ifn ift iia iib iie iif iii iin iit in- ina inb ine inf ini inn int ita itb ite itf iti itn itt n-i naa nab nae naf nai nan nat nba nbb nbe nbf nbi nbn nbt ne- nea neb nee nef nei nen net nfa nfb nfe nff nfi nfn nft nia nib nie nif nii nin nit nna nnb nne nnf nni nnn nnt nta ntb nte ntf nti ntn ntt taa tab tae taf tai tan tat tba tbb tbe tbf tbi tbn tbt te- tea teb tee tef tei ten tet tfa tfb tfe tff tfi tfn tft tia tib tie tif tii tin tit tna tnb tne tnf tni tnn tnt tta ttb tte ttf tti ttn ttt