-er -ic c-- ccc cce cci cck ccl ccp ccr ccs ce- cec cee cei cek cel cep cer ces ci- cic cie cii cik cil cip cir cis ckc cki cks cl- clc cle cli clk cll clp clr cls cpc cpe cpi cpk cpl cpp cpr cps crc cre cri crk crl crp crr crs csc cse csi csk csl csp csr css ec- ecc ece eci eck ecl ecr ecs eec eee eek eel eep eer ees eic eie eii eik eil eip eir eis ekc eke eki ekl ekp ekr eks elc ele eli elk ell elp elr els ep- epc epe epi epl epp epr eps erc ere eri erk erl erp err ers es- esc ese esi esk esl esp esr ess icc ice ici ick icl icp icr ics ie- iec iee iei iek iel iep ier ies iic iie iii iil iip iir iis ikc ike iki ikk ikl ikr iks il- ilc ile ili ilk ill ilp ilr ils ipc ipe ipi ipl ipp ipr ips ir- irc ire iri irk irl irp irr irs is- isc ise isi isk isl isp isr iss kcc kce kci kck kcl kcp kcr kcs ke- kec kee kei kek kel kep ker kes kic kie kii kik kil kip kir kis kkc kke kki kkk kkl kkp kkr kks kl- klc kli klr kls kpc kpe kpi kpk kpl kpp kpr kps krc kri krk krl krp krr krs ksc kse ksi ksk ksl ksp ksr kss l-p lcc lce lci lck lcl lcp lcr lcs lec lee lei lek lel lep ler les lic lie lii lik lil lip lir lis lkl lkp lkr lks llc lle lli llk lll llp llr lls lpc lpe lpi lpk lpl lpp lpr lps lrc lri lrk lrp lrr lrs lsc lse lsi lsk lsl lsp lsr lss p-p pcc pce pci pck pcl pcp pcr pcs pec pee pei pek pel pep per pes pic pie pii pik pil pip pir pis pkc pke pki pkl pkp pkr pks plc ple pli plk pll plp plr pls ppc ppe ppi ppk ppl ppp ppr pps prc pre pri prk prl prp prr prs ps- psc pse psi psk psl psp psr pss rcc rce rci rcl rcp rcr rcs re- rec ree rei rek rel rep rer res ric rie rii rik ril rip rir ris rkc rke rkk rkp rks rlc rle rli rll rlp rlr rls rpc rpe rpi rpk rpl rpp rpr rps rrc rri rrk rrl rrp rrr rrs rsc rse rsi rsk rsl rsp rsr rss scc sce sci sck scl scp scr scs se- sec see sei sek sel sep ser ses sic sie sii sik sil sip sir sis sk- skc ske ski skk skl skp skr sks slc sle sli slk sll slp slr sls spc spe spi spk spl spp spr sps sr- src sre sri srk srl srp srr srs ss- ssc sse ssi ssk ssl ssp ssr sss