-er -ic c-- ccc cce cci cck ccr ccs cct ce- cec cee cei cek cer ces cet ci- cic cie cii cik cir cis cit ckc cki cks ckt crc cre cri crk crr crs crt csc cse csi csk csr css cst ctc cte cti ctk ctr cts ctt ec- ecc ece eci eck ecr ecs ect eec eee eek eer ees eet eic eie eii eik eir eis eit ekc eke eki ekr eks ekt erc ere eri erk err ers ert es- esc ese esi esk esr ess est etc ete eti etk etr ets ett icc ice ici ick icr ics ict ie- iec iee iei iek ier ies iet iic iie iii iir iis iit ikc ike iki ikk ikr iks ikt ir- irc ire iri irk irr irs irt is- isc ise isi isk isr iss ist itc ite iti itk its itt k-t kcc kce kci kck kcr kcs kct ke- kec kee kei kek ker kes ket kic kie kii kik kir kis kit kkc kke kki kkk kkr kks kkt krc kri krk krr krs krt ksc kse ksi ksk ksr kss kst ktc kte ktk ktr kts ktt rcc rce rci rcr rcs rct re- rec ree rei rek rer res ret ric rie rii rik rir ris rit rkc rke rkk rks rkt rrc rri rrk rrr rrs rrt rsc rse rsi rsk rsr rss rst rtc rte rti rtk rtr rts rtt scc sce sci sck scr scs sct se- sec see sei sek ser ses set sic sie sii sik sir sis sit sk- skc ske ski skk skr sks skt sr- src sre sri srk srr srs srt ss- ssc sse ssi ssk ssr sss sst stc ste sti stk str sts stt tcc tce tci tck tcr tcs tct te- tec tee tei tek ter tes tet tic tie tii tik tir tis tit tkc tke tkk tkr tks tkt trc tre tri trk trr trs trt tsc tse tsi tsk tsr tss tst ttc tte tti ttk ttr tts ttt