a-a a-c a-z aaa aac aae aah aaz ac- aca acc ace ach acz aea aec aee aeh aez aha ahc ahe ahh ahz az- aza aze azz c-- caa cac cae cah caz cca ccc cce cch ccz ce- cea cec cee ceh cez ch- cha chc che chh chz cz- czc cze eaa eac eae eah eaz ec- eca ecc ece ech eea eec eee eha ehc ehe ehh eze ezh ezz haa hac hae hah haz hca hcc hce hch he- hea hec hee heh hez hha hhc hhe hhh hhz hze zaa zac zah zaz zce zea zec zee zeh zez zha zhc zhe zzz