a-a a-b a-i a-z aaa aab aag aai aaz ab- aba abb abg abi abz ag- aga agb agg agi agz ai- aia aib aig aii aiz az- aza azb azg azi azz baa bab bag bai baz bba bbb bbg bbi bga bgb bgg bgi bgz bi- bia bib big bii biz bza bzz gaa gab gag gai gaz gba gbg gbi gbz gga ggb ggg ggi ggz gia gib gig gii giz gza ia- iaa iab iag iai iaz iba ibb ibg ibi ibz iga igb igg igi iia iib iii iza izi izz z-g zaa zab zag zai zaz zbb zgb zgg zgi zia zib zig ziz zzz