a-a a-b a-i a-t aaa aab aad aae aaf aai aan aat ab- aba abb abd abe abf abi abn abt ad- ada adb add ade adf adi adn adt aea aeb aed aee aef aei aen aet af- afa afb afd afe aff afi afn aft ai- aia aib aid aie aif aii ain ait an- ana anb and ane anf ani ann ant at- ata atb atd ate atf ati atn att baa bab bad bae baf bai ban bat bba bbb bbd bbe bbf bbi bbn bbt bda bdb bdd bde bdf bdi bdt be- bea beb bed bee bef bei ben bet bfa bfb bfd bfe bff bfi bfn bft bi- bia bib bid bie bif bii bin bit bna bnb bnd bne bnf bni bnn bnt bta btb btd bte btf bti btn btt daa dab dad dae daf dai dan dat dba dbb dbd dbe dbf dbi dbn dbt dda ddb ddd dde ddf ddi ddn ddt de- dea deb ded dee def dei den det dfa dfb dfd dfe dff dfi dfn dft di- dia dib did die dif dii din dit dna dnb dnd dne dnf dni dnn dnt dta dtb dtd dte dtf dti dtn dtt eaa eab ead eae eaf eai ean eat eba ebb ebd ebe ebf ebi ebn ebt ed- eda edb edd ede edf edi edn edt eea eeb eed eee eef een eet ef- efa efb efd efe eff efi eft eia eib eid eie eif eii ein eit en- ena enb end ene enf eni enn ent eta etb etd ete etf eti etn ett faa fab fad fae faf fai fan fat fba fbb fbd fbe fbf fbi fbn fbt fda fdb fdd fde fdf fdi fdn fdt fea feb fed fee fef fei fen fet ffa ffd ffe fff ffi ffn fft fia fib fid fie fif fii fin fit fna fnb fnd fne fnf fni fnn fnt fta ftb ftd fte ftf fti ftn ftt i-d i-f ia- iaa iab iad iae iaf iai ian iat iba ibb ibd ibe ibf ibi ibn ibt ida idb idd ide idf idi idn idt ie- iea ied iee ief iei ien iet ifa ifb ifd ife iff ifi ifn ift iia iib iid iie iif iii iin iit in- ina inb ind ine inf ini inn int ita itb itd ite itf iti itn itt n-i naa nab nad nae naf nai nan nat nba nbb nbd nbe nbf nbi nbn nbt nda ndb ndd nde ndf ndi ndn ndt ne- nea neb ned nee nef nei nen net nfa nfb nfd nfe nff nfi nfn nft nia nib nid nie nif nii nin nit nna nnb nne nnf nni nnn nnt nta ntb ntd nte ntf nti ntn ntt taa tab tad tae taf tai tan tat tba tbb tbd tbe tbf tbi tbn tbt tda tdb tdd tde tdf tdi tdn tdt te- tea teb ted tee tef tei ten tet tfa tfb tfd tfe tff tfi tfn tft tia tib tid tie tif tii tin tit tna tnb tnd tne tnf tni tnn tnt tta ttb ttd tte ttf tti ttn ttt