a-a a-b a-z aaa aab aah aaw aay aaz ab- aba abb abh abw aby abz aha ahb ahh ahw ahy ahz aw- awa awb awh aww awy ay- aya ayh ayw ayz az- aza azb azw azy azz baa bab bah baw bay baz bba bbb bbh bbw bby bha bhb bhh bhw bwa bwb bwh bwy by- bya byh byz bza bzh bzz haa hab hah haw hay haz hba hbb hbh hbw hby hbz hha hhb hhh hhw hhy hhz hw- hwa hwb hww hwy hwz hy- hya hyb hyh hyw hyy hzy waa wab wah waw way waz wba wbb wbw wbz wh- wha whb whh whw why wwa www wy- wya yaa yab yah yaw yay yaz yby ybz yha yhw yyb yyy yyz yzb yzy zaa zab zah zay zaz zbb zbw zby zha zzy zzz