a-a a-c aaa aac aam aas aay ac- aca acc acm acs acy ama amc amm ams amy as- asa asc asm ass asy ay- aya ayc ays c-- caa cac cam cas cay cca ccc ccm ccs cma cmc cmm cms cmy csa csc csm css csy cya cyc cym cys maa mac mam mas may mc- mca mcc mcm mcs mma mmc mmm mms msa msc msm mss msy my- mya myc mym mys saa sac sam sas say sca scc scm scs sma smc smm sms smy ss- ssa ssc ssm sss sy- sya syc sym sys yaa yac yam yas yay yca ycc ycs ycy yma ymc ymm yms ysa ysc ysm yss ysy yyc yys yyy