a-a a-c aaa aac aak aap aar ac- aca acc ack acp acr aka akc akk akp akr ap- apa apc apk app apr ar- ara arc ark arp arr c-- caa cac cak cap car cca ccc cck ccp ccr cka ckc cpa cpc cpk cpp cpr cra crc crk crp crr ka- kaa kac kak kap kar kca kcc kck kcp kcr kkc kkk kkp kkr kpa kpc kpk kpp kpr kra krc krk krp krr p-p paa pac pak pap par pca pcc pck pcp pcr pka pkc pkp pkr ppa ppc ppk ppp ppr pra prc prk prp prr ra- raa rac rak rap rar rca rcc rcp rcr rkc rkk rkp rpa rpc rpk rpp rpr rra rrc rrk rrp rrr