-er -ic c-- ccc cce cci cck ccl ccr ccs ce- cec cee cei cek cel cer ces ci- cic cie cii cik cil cir cis ckc cki cks cl- clc cle cli clk cll clr cls crc cre cri crk crl crr crs csc cse csi csk csl csr css ec- ecc ece eci eck ecl ecr ecs eec eee eek eel eer ees eic eie eii eik eil eir eis ekc eke eki ekl ekr eks elc ele eli elk ell elr els erc ere eri erk erl err ers es- esc ese esi esk esl esr ess icc ice ici ick icl icr ics ie- iec iee iei iek iel ier ies iic iie iii iil iir iis ikc ike iki ikk ikl ikr iks il- ilc ile ili ilk ill ilr ils ir- irc ire iri irk irl irr irs is- isc ise isi isk isl isr iss kcc kce kci kck kcl kcr kcs ke- kec kee kei kek kel ker kes kic kie kii kik kil kir kis kkc kke kki kkk kkl kkr kks kl- klc kli klr kls krc kri krk krl krr krs ksc kse ksi ksk ksl ksr kss lcc lce lci lck lcl lcr lcs lec lee lei lek lel ler les lic lie lii lik lil lir lis lkl lkr lks llc lle lli llk lll llr lls lrc lri lrk lrr lrs lsc lse lsi lsk lsl lsr lss rcc rce rci rcl rcr rcs re- rec ree rei rek rel rer res ric rie rii rik ril rir ris rkc rke rkk rks rlc rle rli rll rlr rls rrc rri rrk rrl rrr rrs rsc rse rsi rsk rsl rsr rss scc sce sci sck scl scr scs se- sec see sei sek sel ser ses sic sie sii sik sil sir sis sk- skc ske ski skk skl skr sks slc sle sli slk sll slr sls sr- src sre sri srk srl srr srs ss- ssc sse ssi ssk ssl ssr sss