a-a a-b a-c aaa aab aac aah aaw ab- aba abb abc abh abw ac- aca acb acc ach acw aha ahb ahc ahh ahw aw- awa awb awc awh aww baa bab bac bah baw bba bbb bbc bbh bbw bca bcb bcc bch bha bhb bhc bhh bhw bwa bwb bwc bwh c-- caa cab cac cah caw cba cbb cbc cbh cbw cca ccb ccc cch ccw ch- cha chb chc chh chw cw- cwa cwb cwc cwh haa hab hac hah haw hba hbb hbc hbh hbw hca hcb hcc hch hcw hha hhb hhc hhh hhw hw- hwa hwb hww waa wab wac wah waw wba wbb wbc wbw wca wcb wcc wch wcw wh- wha whb whc whh whw wwa wwc www