a-a a-b a-i a-t aaa aab aad aae aai aat ab- aba abb abd abe abi abt ad- ada adb add ade adi adt aea aeb aed aee aei aet ai- aia aib aid aie aii ait at- ata atb atd ate ati att baa bab bad bae bai bat bba bbb bbd bbe bbi bbt bda bdb bdd bde bdi bdt be- bea beb bed bee bei bet bi- bia bib bid bie bii bit bta btb btd bte bti btt daa dab dad dae dai dat dba dbb dbd dbe dbi dbt dda ddb ddd dde ddi ddt de- dea deb ded dee dei det di- dia dib did die dii dit dta dtb dtd dte dti dtt eaa eab ead eae eai eat eba ebb ebd ebe ebi ebt ed- eda edb edd ede edi edt eea eeb eed eee eet eia eib eid eie eii eit eta etb etd ete eti ett i-d ia- iaa iab iad iae iai iat iba ibb ibd ibe ibi ibt ida idb idd ide idi idt ie- iea ied iee iei iet iia iib iid iie iii iit ita itb itd ite iti itt taa tab tad tae tai tat tba tbb tbd tbe tbi tbt tda tdb tdd tde tdi tdt te- tea teb ted tee tei tet tia tib tid tie tii tit tta ttb ttd tte tti ttt