a-a a-b a-i a-z aaa aab aad aae aai aak aaz ab- aba abb abd abe abi abk abz ad- ada adb add ade adi adk adz aea aeb aed aee aei aek aez ai- aia aib aid aie aii aik aiz aka akb akd ake aki akk az- aza azb azd aze azi azz baa bab bad bae bai bak baz bba bbb bbd bbe bbi bbk bda bdb bdd bde bdi bdk bdz be- bea beb bed bee bei bek bez bi- bia bib bid bie bii bik biz bka bkb bke bkk bza bzd bze bzz daa dab dad dae dai dak daz dba dbb dbd dbe dbi dbk dbz dda ddb ddd dde ddi ddk ddz de- dea deb ded dee dei dek dez di- dia dib did die dii dik diz dka dkb dke dki dkk dza dzb dzd dze dzi eaa eab ead eae eai eak eaz eba ebb ebd ebe ebi ebk ed- eda edb edd ede edi edk eea eeb eed eee eek eia eib eid eie eii eik eka ekb ekd eke eki eze ezz i-d ia- iaa iab iad iae iai iaz iba ibb ibd ibe ibi ibk ibz ida idb idd ide idi idk ie- iea ied iee iei iek iia iib iid iie iii ika ikb ike iki ikk iza ize izi izz k-z ka- kaa kab kad kae kai kak kaz kba kbb kbd kbe kbi kbk kbz kda kdb kde kdk ke- kea keb ked kee kei kek kez kia kib kid kie kii kik kiz kkb kke kki kkk zaa zab zad zai zak zaz zbb zea zeb zed zee zek zez zia zib zid zie zik ziz zka zzz