a-a a-c aaa aac aar aas aay ac- aca acc acr acs acy ar- ara arc arr ars ary as- asa asc asr ass asy ay- aya ayc ayr ays c-- caa cac car cas cay cca ccc ccr ccs cra crc crr crs cry csa csc csr css csy cya cyc cyr cys ra- raa rac rar ras ray rca rcc rcr rcs rra rrc rrr rrs rsa rsc rsr rss ry- rya ryc ryr rys ryy saa sac sar sas say sca scc scr scs sr- sra src srr srs sry ss- ssa ssc ssr sss sy- sya syc syr sys yaa yac yar yas yay yca ycc ycs ycy yra yrc yrs ysa ysc ysr yss ysy yyc yys yyy