a-a a-c a-z aaa aac aae aak aam aaz ac- aca acc ace ack acm acz aea aec aee aek aem aez aka akc ake akk akm ama amc ame amk amm amz az- aza aze azm azz c-- caa cac cae cak cam caz cca ccc cce cck ccm ccz ce- cea cec cee cek cem cez cka ckc ckm cma cmc cme cmk cmm cz- czc cze czk czm eaa eac eae eak eam eaz ec- eca ecc ece eck ecm eea eec eee eek eem eka ekc eke em- ema emc eme emk emm eze ezz k-z ka- kaa kac kae kak kam kaz kca kcc kce kck kcm ke- kea kec kee kek kem kez kkc kke kkk kkm kma kmc kme kmk kmm kmz maa mac mae mak mam maz mc- mca mcc mce mck mcm mcz mea mec mee mek mem mez mka mkc mke mkk mkm mkz mma mmc mme mmk mmm mmz mza mzm zaa zac zak zam zaz zce zea zec zee zek zem zez zka zma zmc zmk zmm zzz