a-a a-c aaa aac aaf aar aas aay ac- aca acc acf acr acs acy af- afa afc aff afr afs afy ar- ara arc arf arr ars ary as- asa asc asf asr ass asy ay- aya ayc ayf ayr ays c-- caa cac caf car cas cay cca ccc ccf ccr ccs cfa cfc cff cfr cfs cra crc crf crr crs cry csa csc csf csr css csy cya cyc cyf cyr cys faa fac faf far fas fay fca fcc fcf fcr fcs fcy ffa ffc fff ffr ffs ffy fra frc frf frr frs fry fsa fsc fsf fsr fss fy- fya fyc ra- raa rac raf rar ras ray rca rcc rcf rcr rcs rfa rfc rff rfr rfs rra rrc rrf rrr rrs rsa rsc rsf rsr rss ry- rya ryc ryf ryr rys ryy saa sac saf sar sas say sca scc scf scr scs sfa sfc sff sfr sfs sr- sra src srf srr srs sry ss- ssa ssc ssf ssr sss sy- sya syc syr sys yaa yac yaf yar yas yay yca ycc ycf ycs ycy yfa yfc yff yfr yfs yra yrc yrf yrs ysa ysc ysr yss ysy yyc yyf yys yyy