a-a a-z aaa aaf aag aau aay aaz af- afa aff afg afu afy afz ag- aga agf agg agu agy agz au- aua auf aug auz ay- aya ayf ayu ayz az- aza azf azg azu azy azz faa faf fag fau fay faz ffa fff ffg ffu ffy ffz fga fgf fgg fgz fua fuf fug fuu fy- fya fyz gaa gaf gag gau gay gaz gfa gff gfy gfz gga ggg ggu ggz gu- gua guf gug guu guy guz gy- gya gyf gza gzu ua- uaa uaf uag uau uay uaz ufa uff ufg ufu uga ugf ugg ugu uua uug uuu uyu uza uzu yaa yaf yag yau yay yaz yfa yff yfu yga yua yug yuu yuy yyf yyg yyu yyy yyz yzf yzu yzy z-g zaa zaf zag zay zaz zfa zfy zgg zug zuz zzy zzz