-er -ic -ji c-- c-j ccc cce cci ccj cck cco ccr ccs ce- cec cee cei cej cek ceo cer ces ci- cic cie cii cij cik cio cir cis cjc cjk cjr cjs ckc cki cko cks co- coc coe coi coj cok coo cor cos crc cre cri crj crk cro crr crs csc cse csi csj csk cso csr css ec- ecc ece eci ecj eck eco ecr ecs eec eee eek eeo eer ees eic eie eii eij eik eio eir eis ejc eji ejo ekc eke eki eko ekr eks eo- eoc eoe eoi eok eoo eor eos erc ere eri erk ero err ers es- esc ese esi esk eso esr ess icc ice ici icj ick ico icr ics ie- iec iee iei iej iek ier ies iic iie iii iij iio iir iis ijc ije iji ijk ijo ijs ikc ike iki ikk iko ikr iks io- ioc ioe ioi ioj ioo ior ios ir- irc ire iri irj irk iro irr irs is- isc ise isi isj isk iso isr iss j-i jcc jce jci jck jco jcr jcs jec jee jei jej jek jeo jer jes jic jie jii jij jio jir jis jjc jjj jjk jjr jjs jkk jko jkr jks joc joe joi joj jok joo jor jos jrc jri jrk jro jrr jrs jsc jse jsi jsj jsk jso jsr jss kcc kce kci kck kcr kcs ke- kec kee kei kek keo ker kes kic kie kii kij kik kio kir kis kjc kje kji kjr kjs kkc kke kki kkk kkr kks koc koe koi kok koo kor kos krc kri krk kro krr krs ksc kse ksi ksk kso ksr kss o-i oc- occ oci ocj ock oco ocr ocs oec oee oei oeo oer oes oic oie oii oik oio oir ois ojc oje oji ojo ojs okc oke oki okj okk oko okr oks oo- ooc ooi ook ooo oor oos or- orc ore ori ork oro orr ors os- osc ose osi osj osk oso osr oss rcc rce rci rcj rco rcr rcs re- rec ree rei rek reo rer res ric rie rii rik rio rir ris rjc rjk rjr rkc rke rkk rko rks roc roe roi roj rok roo ror ros rrc rri rrk rrr rrs rsc rse rsi rsj rsk rso rsr rss scc sce sci scj sck sco scr scs se- sec see sei sej sek seo ser ses sic sie sii sij sik sio sir sis sjc sje sji sjj sjk sjr sjs sk- skc ske ski skj skk sko skr sks soc soe soi soj sok soo sor sos sr- src sre sri srj srk sro srr srs ss- ssc sse ssi ssj ssk sso ssr sss