a-a a-c aaa aac aao aap aar aay ac- aca acc aco acp acr acy aoa aoc aoo aop aor ap- apa apc apo app apr apy ar- ara arc aro arp arr ary ay- aya ayc ayo ayp ayr c-- caa cac cao cap car cay cca ccc cco ccp ccr co- coa coc coo cop cor coy cpa cpc cpo cpp cpr cra crc cro crp crr cry cya cyc cyo cyp cyr oaa oac oao oap oar oc- oca occ oco ocp ocr oo- ooa ooc ooo oop oor op- opa opc opo opp opr opy or- ora orc oro orp orr ory oya oyo p-p paa pac pao pap par pay pca pcc pco pcp pcr poa poc poo pop por poy ppa ppc ppo ppp ppr pra prc pro prp prr pry py- pya pyc pyo pyr ra- raa rac rao rap rar ray rca rcc rco rcp rcr roa roc roo rop ror roy rpa rpc rpo rpp rpr rra rrc rrp rrr ry- rya ryc ryo ryr ryy yaa yac yao yap yar yay yca ycc yco ycp ycy yoc yoo yop yor yoy ypa ypo yra yrc yro yrp yyc yyy