a-a a-b a-i a-z aaa aab aad aai aaz ab- aba abb abd abi abz ad- ada adb add adi adz ai- aia aib aid aii aiz az- aza azb azd azi azz baa bab bad bai baz bba bbb bbd bbi bda bdb bdd bdi bdz bi- bia bib bid bii biz bza bzd bzz daa dab dad dai daz dba dbb dbd dbi dbz dda ddb ddd ddi ddz di- dia dib did dii diz dza dzb dzd dzi i-d ia- iaa iab iad iai iaz iba ibb ibd ibi ibz ida idb idd idi iia iib iid iii iza izi izz zaa zab zad zai zaz zbb zia zib zid ziz zzz