a-a a-b a-i a-z aaa aab aad aae aai aaz ab- aba abb abd abe abi abz ad- ada adb add ade adi adz aea aeb aed aee aei aez ai- aia aib aid aie aii aiz az- aza azb azd aze azi azz baa bab bad bae bai baz bba bbb bbd bbe bbi bda bdb bdd bde bdi bdz be- bea beb bed bee bei bez bi- bia bib bid bie bii biz bza bzd bze bzz daa dab dad dae dai daz dba dbb dbd dbe dbi dbz dda ddb ddd dde ddi ddz de- dea deb ded dee dei dez di- dia dib did die dii diz dza dzb dzd dze dzi eaa eab ead eae eai eaz eba ebb ebd ebe ebi ed- eda edb edd ede edi eea eeb eed eee eia eib eid eie eii eze ezz i-d ia- iaa iab iad iae iai iaz iba ibb ibd ibe ibi ibz ida idb idd ide idi ie- iea ied iee iei iia iib iid iie iii iza ize izi izz zaa zab zad zai zaz zbb zea zeb zed zee zez zia zib zid zie ziz zzz