a-a a-b a-i a-t aaa aab aad aae aai aak aat ab- aba abb abd abe abi abk abt ad- ada adb add ade adi adk adt aea aeb aed aee aei aek aet ai- aia aib aid aie aii aik ait aka akb akd ake aki akk at- ata atb atd ate ati att baa bab bad bae bai bak bat bba bbb bbd bbe bbi bbk bbt bda bdb bdd bde bdi bdk bdt be- bea beb bed bee bei bek bet bi- bia bib bid bie bii bik bit bka bkb bke bkk bkt bta btb btd bte bti btk btt daa dab dad dae dai dak dat dba dbb dbd dbe dbi dbk dbt dda ddb ddd dde ddi ddk ddt de- dea deb ded dee dei dek det di- dia dib did die dii dik dit dka dkb dke dki dkk dkt dta dtb dtd dte dti dtk dtt eaa eab ead eae eai eak eat eba ebb ebd ebe ebi ebk ebt ed- eda edb edd ede edi edk edt eea eeb eed eee eek eet eia eib eid eie eii eik eit eka ekb ekd eke eki ekt eta etb etd ete eti etk ett i-d ia- iaa iab iad iae iai iat iba ibb ibd ibe ibi ibk ibt ida idb idd ide idi idk idt ie- iea ied iee iei iek iet iia iib iid iie iii iit ika ikb ike iki ikk ikt ita itb itd ite iti itk itt k-t ka- kaa kab kad kae kai kak kat kba kbb kbd kbe kbi kbk kda kdb kde kdk kdt ke- kea keb ked kee kei kek ket kia kib kid kie kii kik kit kkb kke kki kkk kkt kta ktb kte ktk ktt taa tab tad tae tai tak tat tba tbb tbd tbe tbi tbk tbt tda tdb tdd tde tdi tdk tdt te- tea teb ted tee tei tek tet tia tib tid tie tii tik tit tka tkb tke tkk tkt tta ttb ttd tte tti ttk ttt