a-a a-b a-i a-t aaa aab aad aae aai aak aan aat ab- aba abb abd abe abi abk abn abt ad- ada adb add ade adi adk adn adt aea aeb aed aee aei aek aen aet ai- aia aib aid aie aii aik ain ait aka akb akd ake aki akk akn an- ana anb and ane ani ank ann ant at- ata atb atd ate ati atn att baa bab bad bae bai bak ban bat bba bbb bbd bbe bbi bbk bbn bbt bda bdb bdd bde bdi bdk bdt be- bea beb bed bee bei bek ben bet bi- bia bib bid bie bii bik bin bit bka bkb bke bkk bkn bkt bna bnb bnd bne bni bnk bnn bnt bta btb btd bte bti btk btn btt daa dab dad dae dai dak dan dat dba dbb dbd dbe dbi dbk dbn dbt dda ddb ddd dde ddi ddk ddn ddt de- dea deb ded dee dei dek den det di- dia dib did die dii dik din dit dka dkb dke dki dkk dkt dna dnb dnd dne dni dnk dnn dnt dta dtb dtd dte dti dtk dtn dtt eaa eab ead eae eai eak ean eat eba ebb ebd ebe ebi ebk ebn ebt ed- eda edb edd ede edi edk edn edt eea eeb eed eee eek een eet eia eib eid eie eii eik ein eit eka ekb ekd eke eki ekt en- ena enb end ene eni enk enn ent eta etb etd ete eti etk etn ett i-d ia- iaa iab iad iae iai ian iat iba ibb ibd ibe ibi ibk ibn ibt ida idb idd ide idi idk idn idt ie- iea ied iee iei iek ien iet iia iib iid iie iii iin iit ika ikb ike iki ikk ikt in- ina inb ind ine ini ink inn int ita itb itd ite iti itk itn itt k-t ka- kaa kab kad kae kai kak kan kat kba kbb kbd kbe kbi kbk kbn kda kdb kde kdk kdt ke- kea keb ked kee kei kek ken ket kia kib kid kie kii kik kin kit kkb kke kki kkk kkn kkt kn- kna knd kne kni knk knn knt kta ktb kte ktk ktn ktt n-i naa nab nad nae nai nak nan nat nba nbb nbd nbe nbi nbk nbn nbt nda ndb ndd nde ndi ndk ndn ndt ne- nea neb ned nee nei nek nen net nia nib nid nie nii nik nin nit nka nke nki nkk nkn nkt nna nnb nne nni nnk nnn nnt nta ntb ntd nte nti ntk ntn ntt taa tab tad tae tai tak tan tat tba tbb tbd tbe tbi tbk tbn tbt tda tdb tdd tde tdi tdk tdn tdt te- tea teb ted tee tei tek ten tet tia tib tid tie tii tik tin tit tka tkb tke tkk tkt tna tnb tnd tne tni tnk tnn tnt tta ttb ttd tte tti ttk ttn ttt