a-a a-c a-z aaa aac aam aan aaz ac- aca acc acm acn acz ama amc amm amn amz an- ana anc anm ann anz az- aza azm azn azz c-- caa cac cam can caz cca ccc ccm ccn ccz cma cmc cmm cmn cn- cna cnc cnm cnn cz- czc czm maa mac mam man maz mc- mca mcc mcm mcn mcz mma mmc mmm mmn mmz mna mnc mnm mnn mnz mza mzm mzn naa nac nam nan naz nca ncc ncm ncn nma nmc nmm nmn nmz nna nnc nnm nnn nnz nzz zaa zac zam zan zaz zma zmc zmm znc znn zzz