a-a a-b a-c aaa aab aac aah aaw aay ab- aba abb abc abh abw aby ac- aca acb acc ach acw acy aha ahb ahc ahh ahw ahy aw- awa awb awc awh aww awy ay- aya ayc ayh ayw baa bab bac bah baw bay bba bbb bbc bbh bbw bby bca bcb bcc bch bcy bha bhb bhc bhh bhw bwa bwb bwc bwh bwy by- bya byc byh c-- caa cab cac cah caw cay cba cbb cbc cbh cbw cby cca ccb ccc cch ccw ch- cha chb chc chh chw chy cw- cwa cwb cwc cwh cya cyb cyc cyw haa hab hac hah haw hay hba hbb hbc hbh hbw hby hca hcb hcc hch hcw hcy hha hhb hhc hhh hhw hhy hw- hwa hwb hww hwy hy- hya hyb hyc hyh hyw hyy waa wab wac wah waw way wba wbb wbc wbw wca wcb wcc wch wcw wh- wha whb whc whh whw why wwa wwc www wy- wya wyc yaa yab yac yah yaw yay ybc yby yca ycc ych ycw ycy yha yhc yhw ywc yyb yyc yyy