a-a a-c a-z aaa aac aah aan aaz ac- aca acc ach acn acz aha ahc ahh ahn ahz an- ana anc anh ann anz az- aza azn azz c-- caa cac cah can caz cca ccc cch ccn ccz ch- cha chc chh chn chz cn- cna cnc cnh cnn cz- czc haa hac hah han haz hca hcc hch hcn hha hhc hhh hhn hhz hna hnc hnh hnn hnz naa nac nah nan naz nca ncc nch ncn nha nhc nhh nhn nhz nna nnc nnh nnn nnz nzz zaa zac zah zan zaz zha zhc znc znn zzz