a-a a-c aaa aac aak aas aay ac- aca acc ack acs acy aka akc akk aks as- asa asc ask ass asy ay- aya ayc ayk ays c-- caa cac cak cas cay cca ccc cck ccs cka ckc cks cky csa csc csk css csy cya cyc cyk cys ka- kaa kac kak kas kay kca kcc kck kcs kkc kkk kks kky ksa ksc ksk kss kya kyc kys saa sac sak sas say sca scc sck scs sk- ska skc skk sks sky ss- ssa ssc ssk sss sy- sya syc syk sys yaa yac yak yas yay yca ycc ycs ycy yka ykk ysa ysc ysk yss ysy yyc yys yyy