-er -ic -ol c-- ccc cce cci cck ccl cco ccr ccs ce- cec cee cei cek cel ceo cer ces ci- cic cie cii cik cil cio cir cis ckc cki cko cks cl- clc cle cli clk cll clo clr cls co- coc coe coi cok col coo cor cos crc cre cri crk crl cro crr crs csc cse csi csk csl cso csr css ec- ecc ece eci eck ecl eco ecr ecs eec eee eek eel eeo eer ees eic eie eii eik eil eio eir eis ekc eke eki ekl eko ekr eks elc ele eli elk ell elo elr els eo- eoc eoe eoi eok eol eoo eor eos erc ere eri erk erl ero err ers es- esc ese esi esk esl eso esr ess icc ice ici ick icl ico icr ics ie- iec iee iei iek iel ier ies iic iie iii iil iio iir iis ikc ike iki ikk ikl iko ikr iks il- ilc ile ili ilk ill ilo ilr ils io- ioc ioe ioi iol ioo ior ios ir- irc ire iri irk irl iro irr irs is- isc ise isi isk isl iso isr iss kcc kce kci kck kcl kcr kcs ke- kec kee kei kek kel keo ker kes kic kie kii kik kil kio kir kis kkc kke kki kkk kkl kkr kks kl- klc kli klo klr kls koc koe koi kok kol koo kor kos krc kri krk krl kro krr krs ksc kse ksi ksk ksl kso ksr kss lcc lce lci lck lcl lco lcr lcs lec lee lei lek lel leo ler les lic lie lii lik lil lio lir lis lkl lkr lks llc lle lli llk lll llo llr lls loc loe loi lok lol loo lor los lrc lri lrk lro lrr lrs lsc lse lsi lsk lsl lso lsr lss o-i oc- occ oci ock ocl oco ocr ocs oec oee oei oel oeo oer oes oic oie oii oik oil oio oir ois okc oke oki okk okl oko okr oks olc ole oli olk oll olo ols oo- ooc ooi ook ool ooo oor oos or- orc ore ori ork orl oro orr ors os- osc ose osi osk osl oso osr oss rcc rce rci rcl rco rcr rcs re- rec ree rei rek rel reo rer res ric rie rii rik ril rio rir ris rkc rke rkk rko rks rlc rle rli rll rlo rlr rls roc roe roi rok rol roo ror ros rrc rri rrk rrl rrr rrs rsc rse rsi rsk rsl rso rsr rss scc sce sci sck scl sco scr scs se- sec see sei sek sel seo ser ses sic sie sii sik sil sio sir sis sk- skc ske ski skk skl sko skr sks slc sle sli slk sll slo slr sls soc soe soi sok sol soo sor sos sr- src sre sri srk srl sro srr srs ss- ssc sse ssi ssk ssl sso ssr sss