a-a a-c a-z aaa aac aak aap aaz ac- aca acc ack acp acz aka akc akk akp ap- apa apc apk app az- aza azp azz c-- caa cac cak cap caz cca ccc cck ccp ccz cka ckc cpa cpc cpk cpp cpz cz- czc czk k-z ka- kaa kac kak kap kaz kca kcc kck kcp kkc kkk kkp kpa kpc kpk kpp p-p paa pac pak pap paz pca pcc pck pcp pka pkc pkp ppa ppc ppk ppp ppz pzc pzk pzp zaa zac zak zap zaz zka zpc zpp zzz