-ey a-a a-c aaa aac aae aap aas aay ac- aca acc ace acp acs acy aea aec aee aep aes aey ap- apa apc ape app aps apy as- asa asc ase asp ass asy ay- aya ayc aye ayp ays c-- caa cac cae cap cas cay cca ccc cce ccp ccs ce- cea cec cee cep ces cey cpa cpc cpe cpp cps csa csc cse csp css csy cya cyc cye cyp cys eaa eac eae eap eas ec- eca ecc ece ecs eea eec eee eep ees eey ep- epa epc epe epp eps es- esa esc ese esp ess esy eya eyc eye eyp eys p-p paa pac pae pap pas pay pca pcc pce pcp pcs pea pec pee pep pes pey ppa ppc ppe ppp pps ps- psa psc pse psp pss psy py- pya pyc pye pys saa sac sae sap sas say sca scc sce scp scs se- sea sec see sep ses sey spa spc spe spp sps spy ss- ssa ssc sse ssp sss sy- sya syc sye syp sys yaa yac yae yap yas yay yca ycc yce ycp ycs ycy yea yec yee yep yes yey ypa yps ysa ysc yse ysp yss ysy yyc yye yys yyy