a-a a-c aaa aac aas aav aay ac- aca acc acs acv acy as- asa asc ass asv asy av- ava avc avs avy ay- aya ayc ays c-- caa cac cas cav cay cca ccc ccs ccv csa csc css csv csy cva cvc cvs cvv cya cyc cys saa sac sas sav say sca scc scs scv ss- ssa ssc sss ssv sva svc svs svv svy sy- sya syc sys v-a vaa vac vas vav vay vca vcc vcs vcy vsa vsc vss vsv vva vvc vvs vvv yaa yac yas yav yay yca ycc ycs ycv ycy ysa ysc yss ysy yva yvy yyc yys yyy