a-a a-c aaa aac aap aar aay ac- aca acc acp acr acy ap- apa apc app apr apy ar- ara arc arp arr ary ay- aya ayc ayp ayr c-- caa cac cap car cay cca ccc ccp ccr cpa cpc cpp cpr cra crc crp crr cry cya cyc cyp cyr p-p paa pac pap par pay pca pcc pcp pcr ppa ppc ppp ppr pra prc prp prr pry py- pya pyc pyr ra- raa rac rap rar ray rca rcc rcp rcr rpa rpc rpp rpr rra rrc rrp rrr ry- rya ryc ryr ryy yaa yac yap yar yay yca ycc ycp ycy ypa yra yrc yrp yyc yyy