-er -ey c-- ccc cce ccr ccs cct ce- cec cee cer ces cet cey crc cre crr crs crt cry csc cse csr css cst csy ctc cte ctr cts ctt cty cyc cye cyr cys cyt ec- ecc ece ecr ecs ect eec eee eer ees eet eey erc ere err ers ert ery es- esc ese esr ess est esy etc ete etr ets ett ety eyc eye eyr eys eyt rcc rce rcr rcs rct re- rec ree rer res ret rey rrc rrr rrs rrt rsc rse rsr rss rst rtc rte rtr rts rtt rty ry- ryc rye ryr rys ryy scc sce scr scs sct se- sec see ser ses set sey sr- src sre srr srs srt sry ss- ssc sse ssr sss sst stc ste str sts stt sty sy- syc sye syr sys syt tcc tce tcr tcs tct te- tec tee ter tes tet tey trc tre trr trs trt try tsc tse tsr tss tst tsy ttc tte ttr tts ttt tty tyc tye tyr tys tyt ycc yce ycs ycy yec yee yer yes yet yey yrc yre yrs yrt ysc yse ysr yss yst ysy ytc yte ytr yts ytt yyc yye yys yyt yyy