a-a a-c aaa aac aak aap aay ac- aca acc ack acp acy aka akc akk akp ap- apa apc apk app apy ay- aya ayc ayk ayp c-- caa cac cak cap cay cca ccc cck ccp cka ckc cky cpa cpc cpk cpp cya cyc cyk cyp ka- kaa kac kak kap kay kca kcc kck kcp kkc kkk kkp kky kpa kpc kpk kpp kya kyc kyp p-p paa pac pak pap pay pca pcc pck pcp pka pkc pkp pky ppa ppc ppk ppp py- pya pyc pyk yaa yac yak yap yay yca ycc ycp ycy yka ykk ypa yyc yyy