-er -ic c-- ccc cce cci cck cco ccr ccs ccv ce- cec cee cei cek ceo cer ces cev ci- cic cie cii cik cio cir cis civ ckc cki cko cks co- coc coe coi cok coo cor cos cov crc cre cri crk cro crr crs crv csc cse csi csk cso csr css csv cvc cve cvi cvk cvo cvr cvs cvv ec- ecc ece eci eck eco ecr ecs ecv eec eee eek eeo eer ees eev eic eie eii eik eio eir eis eiv ekc eke eki eko ekr eks ekv eo- eoc eoe eoi eok eoo eor eos erc ere eri erk ero err ers erv es- esc ese esi esk eso esr ess esv evc eve evi evo evr evs evv i-v icc ice ici ick ico icr ics icv ie- iec iee iei iek ier ies iev iic iie iii iio iir iis ikc ike iki ikk iko ikr iks ikv io- ioc ioe ioi ioo ior ios iov ir- irc ire iri irk iro irr irs irv is- isc ise isi isk iso isr iss isv ivc ive ivi ivo ivr ivs ivv kcc kce kci kck kcr kcs ke- kec kee kei kek keo ker kes kev kic kie kii kik kio kir kis kiv kkc kke kki kkk kkr kks kkv koc koe koi kok koo kor kos krc kri krk kro krr krs krv ksc kse ksi ksk kso ksr kss ksv kvi kvk kvo kvr kvs kvv o-i oc- occ oci ock oco ocr ocs ocv oec oee oei oeo oer oes oic oie oii oik oio oir ois oiv okc oke oki okk oko okr oks oo- ooc ooi ook ooo oor oos oov or- orc ore ori ork oro orr ors orv os- osc ose osi osk oso osr oss osv ov- ovc ove ovi ovo ovs ovv rcc rce rci rco rcr rcs rcv re- rec ree rei rek reo rer res rev ric rie rii rik rio rir ris riv rkc rke rkk rko rks rkv roc roe roi rok roo ror ros rov rrc rri rrk rrr rrs rsc rse rsi rsk rso rsr rss rsv rvc rve rvi rvo rvr rvs rvv scc sce sci sck sco scr scs scv se- sec see sei sek seo ser ses sev sic sie sii sik sio sir sis siv sk- skc ske ski skk sko skr sks soc soe soi sok soo sor sos sov sr- src sre sri srk sro srr srs srv ss- ssc sse ssi ssk sso ssr sss ssv svc sve svi svk svo svr svs svv v-e vcc vce vci vco vcr vcs vec vee vei vek veo ver ves vi- vic vie vii vik vio vir vis viv voc voe voi vok voo vor vos vov vrc vre vri vrk vrr vrs vsc vse vsi vsk vso vsr vss vsv vvc vvi vvo vvr vvs vvv