a-a a-b a-z aaa aab aag aau aay aaz ab- aba abb abg abu aby abz ag- aga agb agg agu agy agz au- aua aub aug auz ay- aya ayu ayz az- aza azb azg azu azy azz b-u baa bab bag bau bay baz bba bbb bbg bbu bby bga bgb bgg bgu bgz bua bub bug buu buy buz by- bya byg byu byz bza bzu bzz gaa gab gag gau gay gaz gba gbg gbu gby gbz gga ggb ggg ggu ggz gu- gua gub gug guu guy guz gy- gya gyb gza gzu ua- uaa uab uag uau uay uaz uba ubb ubg ubu uby uga ugb ugg ugu uua uug uuu uyu uza uzb uzu yaa yab yag yau yay yaz ybg yby ybz yga yua yug yuu yuy yyb yyg yyu yyy yyz yzb yzu yzy z-g zaa zab zag zay zaz zbb zby zgb zgg zub zug zuz zzy zzz