-er c-- ccc cce ccr ccs cct ccz ce- cec cee cer ces cet cez crc cre crr crs crt crz csc cse csr css cst csz ctc cte ctr cts ctt ctz cz- czc cze czt ec- ecc ece ecr ecs ect eec eee eer ees eet erc ere err ers ert erz es- esc ese esr ess est etc ete etr ets ett etz eze ezr ezs ezz rcc rce rcr rcs rct re- rec ree rer res ret rez rrc rrr rrs rrt rsc rse rsr rss rst rtc rte rtr rts rtt rtz rze scc sce scr scs sct se- sec see ser ses set sez sr- src sre srr srs srt ss- ssc sse ssr sss sst ssz stc ste str sts stt stz sze szr tcc tce tcr tcs tct te- tec tee ter tes tet tez trc tre trr trs trt trz tsc tse tsr tss tst ttc tte ttr tts ttt tze tzs zce zcs zec zee zer zes zet zez zrs zse zst zsz zte ztr zzr zzs zzt zzz