-ey a-a a-c aaa aac aae aao aas aay ac- aca acc ace aco acs acy aea aec aee aeo aes aey aoa aoc aoe aoo aos as- asa asc ase aso ass asy ay- aya ayc aye ayo ays c-- caa cac cae cao cas cay cca ccc cce cco ccs ce- cea cec cee ceo ces cey co- coa coc coe coo cos coy csa csc cse cso css csy cya cyc cye cyo cys eaa eac eae eao eas ec- eca ecc ece eco ecs eea eec eee eeo ees eey eo- eoa eoc eoe eoo eos es- esa esc ese eso ess esy eya eyc eye eyo eys oaa oac oae oao oas oc- oca occ oco ocs oea oec oee oeo oes oey oo- ooa ooc ooo oos os- osa osc ose oso oss oya oye oyo oys saa sac sae sao sas say sca scc sce sco scs se- sea sec see seo ses sey soa soc soe soo sos soy ss- ssa ssc sse sso sss sy- sya syc sye sys yaa yac yae yao yas yay yca ycc yce yco ycs ycy yea yec yee yeo yes yey yoc yoe yoo yos yoy ysa ysc yse yso yss ysy yyc yye yys yyy