-er -ic c-- ccc cce cci cck ccr ccs ccv ce- cec cee cei cek cer ces cev ci- cic cie cii cik cir cis civ ckc cki cks crc cre cri crk crr crs crv csc cse csi csk csr css csv cvc cve cvi cvk cvr cvs cvv ec- ecc ece eci eck ecr ecs ecv eec eee eek eer ees eev eic eie eii eik eir eis eiv ekc eke eki ekr eks ekv erc ere eri erk err ers erv es- esc ese esi esk esr ess esv evc eve evi evr evs evv i-v icc ice ici ick icr ics icv ie- iec iee iei iek ier ies iev iic iie iii iir iis ikc ike iki ikk ikr iks ikv ir- irc ire iri irk irr irs irv is- isc ise isi isk isr iss isv ivc ive ivi ivr ivs ivv kcc kce kci kck kcr kcs ke- kec kee kei kek ker kes kev kic kie kii kik kir kis kiv kkc kke kki kkk kkr kks kkv krc kri krk krr krs krv ksc kse ksi ksk ksr kss ksv kvi kvk kvr kvs kvv rcc rce rci rcr rcs rcv re- rec ree rei rek rer res rev ric rie rii rik rir ris riv rkc rke rkk rks rkv rrc rri rrk rrr rrs rsc rse rsi rsk rsr rss rsv rvc rve rvi rvr rvs rvv scc sce sci sck scr scs scv se- sec see sei sek ser ses sev sic sie sii sik sir sis siv sk- skc ske ski skk skr sks sr- src sre sri srk srr srs srv ss- ssc sse ssi ssk ssr sss ssv svc sve svi svk svr svs svv v-e vcc vce vci vcr vcs vec vee vei vek ver ves vi- vic vie vii vik vir vis viv vrc vre vri vrk vrr vrs vsc vse vsi vsk vsr vss vsv vvc vvi vvr vvs vvv