a-a a-b a-i a-t aaa aab aad aae aai aan aat ab- aba abb abd abe abi abn abt ad- ada adb add ade adi adn adt aea aeb aed aee aei aen aet ai- aia aib aid aie aii ain ait an- ana anb and ane ani ann ant at- ata atb atd ate ati atn att baa bab bad bae bai ban bat bba bbb bbd bbe bbi bbn bbt bda bdb bdd bde bdi bdt be- bea beb bed bee bei ben bet bi- bia bib bid bie bii bin bit bna bnb bnd bne bni bnn bnt bta btb btd bte bti btn btt daa dab dad dae dai dan dat dba dbb dbd dbe dbi dbn dbt dda ddb ddd dde ddi ddn ddt de- dea deb ded dee dei den det di- dia dib did die dii din dit dna dnb dnd dne dni dnn dnt dta dtb dtd dte dti dtn dtt eaa eab ead eae eai ean eat eba ebb ebd ebe ebi ebn ebt ed- eda edb edd ede edi edn edt eea eeb eed eee een eet eia eib eid eie eii ein eit en- ena enb end ene eni enn ent eta etb etd ete eti etn ett i-d ia- iaa iab iad iae iai ian iat iba ibb ibd ibe ibi ibn ibt ida idb idd ide idi idn idt ie- iea ied iee iei ien iet iia iib iid iie iii iin iit in- ina inb ind ine ini inn int ita itb itd ite iti itn itt n-i naa nab nad nae nai nan nat nba nbb nbd nbe nbi nbn nbt nda ndb ndd nde ndi ndn ndt ne- nea neb ned nee nei nen net nia nib nid nie nii nin nit nna nnb nne nni nnn nnt nta ntb ntd nte nti ntn ntt taa tab tad tae tai tan tat tba tbb tbd tbe tbi tbn tbt tda tdb tdd tde tdi tdn tdt te- tea teb ted tee tei ten tet tia tib tid tie tii tin tit tna tnb tnd tne tni tnn tnt tta ttb ttd tte tti ttn ttt