-er -ey a-a a-c aaa aac aae aar aas aax aay ac- aca acc ace acr acs acx acy aea aec aee aer aes aex aey ar- ara arc are arr ars arx ary as- asa asc ase asr ass asx asy ax- axa axe axr axs axx ay- aya ayc aye ayr ays ayx c-- caa cac cae car cas cax cay cca ccc cce ccr ccs ccx ce- cea cec cee cer ces cex cey cra crc cre crr crs crx cry csa csc cse csr css csx csy cxc cxr cxs cxx cya cyc cye cyr cys eaa eac eae ear eas eax ec- eca ecc ece ecr ecs ecx eea eec eee eer ees eex eey era erc ere err ers ery es- esa esc ese esr ess esx esy ex- exa exc exe exr exs exx exy eya eyc eye eyr eys ra- raa rac rae rar ras rax ray rca rcc rce rcr rcs rcx re- rea rec ree rer res rex rey rra rrc rrr rrs rsa rsc rse rsr rss rsx rxr rxs ry- rya ryc rye ryr rys ryy saa sac sae sar sas sax say sca scc sce scr scs scx se- sea sec see ser ses sex sey sr- sra src sre srr srs srx sry ss- ssa ssc sse ssr sss ssx sxc sxs sy- sya syc sye syr sys syx xaa xac xar xas xcr xcx xee xer xes xex xrc xrx xry xsa xsc xss xxx xxy xyr xyy yaa yac yae yar yas yax yay yca ycc yce ycs ycy yea yec yee yer yes yex yey yra yrc yre yrs ysa ysc yse ysr yss ysy yxa yxe yxy yyc yye yys yyy