-er -ic -ol c-- ccc cce ccf cci cck ccl cco ccr ccs ce- cec cee cef cei cek cel ceo cer ces cfc cfe cff cfi cfk cfl cfo cfr cfs ci- cic cie cif cii cik cil cio cir cis ckc cki cko cks cl- clc cle clf cli clk cll clo clr cls co- coc coe cof coi cok col coo cor cos crc cre crf cri crk crl cro crr crs csc cse csf csi csk csl cso csr css ec- ecc ece ecf eci eck ecl eco ecr ecs eec eee eef eek eel eeo eer ees ef- efc efe eff efi efl efo efr efs eic eie eif eii eik eil eio eir eis ekc eke ekf eki ekl eko ekr eks elc ele elf eli elk ell elo elr els eo- eoc eoe eof eoi eok eol eoo eor eos erc ere erf eri erk erl ero err ers es- esc ese esf esi esk esl eso esr ess fcc fce fcf fci fck fcl fco fcr fcs fec fee fef fei fek fel feo fer fes ffc ffe fff ffi ffk ffl ffo ffr ffs fic fie fif fii fik fil fir fis fkc fkf fki fkk fkl flc fle flf fli fll flo flr fls foc foe fof foi fok fol foo for fos frc fre frf fri frk frl fro frr frs fsc fse fsf fsi fsk fsl fso fsr fss i-f icc ice icf ici ick icl ico icr ics ie- iec iee ief iei iek iel ier ies ifc ife iff ifi ifl ifo ifr ifs iic iie iif iii iil iio iir iis ikc ike ikf iki ikk ikl iko ikr iks il- ilc ile ilf ili ilk ill ilo ilr ils io- ioc ioe iof ioi iol ioo ior ios ir- irc ire irf iri irk irl iro irr irs is- isc ise isf isi isk isl iso isr iss kcc kce kci kck kcl kcr kcs ke- kec kee kef kei kek kel keo ker kes kfc kff kfi kfo kfs kic kie kif kii kik kil kio kir kis kkc kke kki kkk kkl kkr kks kl- klc klf kli klo klr kls koc koe kof koi kok kol koo kor kos krc krf kri krk krl kro krr krs ksc kse ksf ksi ksk ksl kso ksr kss lcc lce lcf lci lck lcl lco lcr lcs lec lee lef lei lek lel leo ler les lfc lfe lff lfi lfk lfl lfo lfr lfs lic lie lif lii lik lil lio lir lis lkl lkr lks llc lle llf lli llk lll llo llr lls loc loe lof loi lok lol loo lor los lrc lrf lri lrk lro lrr lrs lsc lse lsf lsi lsk lsl lso lsr lss o-i oc- occ ocf oci ock ocl oco ocr ocs oec oee oef oei oel oeo oer oes of- ofc ofe off ofi ofl ofo ofr ofs oic oie oif oii oik oil oio oir ois okc oke oki okk okl oko okr oks olc ole olf oli olk oll olo ols oo- ooc oof ooi ook ool ooo oor oos or- orc ore orf ori ork orl oro orr ors os- osc ose osf osi osk osl oso osr oss rcc rce rcf rci rcl rco rcr rcs re- rec ree ref rei rek rel reo rer res rfc rfe rff rfi rfk rfl rfo rfr rfs ric rie rif rii rik ril rio rir ris rkc rke rkf rkk rko rks rlc rle rlf rli rll rlo rlr rls roc roe rof roi rok rol roo ror ros rrc rrf rri rrk rrl rrr rrs rsc rse rsf rsi rsk rsl rso rsr rss scc sce scf sci sck scl sco scr scs se- sec see sef sei sek sel seo ser ses sfc sfe sff sfi sfk sfl sfo sfr sfs sic sie sif sii sik sil sio sir sis sk- skc ske skf ski skk skl sko skr sks slc sle slf sli slk sll slo slr sls soc soe sof soi sok sol soo sor sos sr- src sre srf sri srk srl sro srr srs ss- ssc sse ssf ssi ssk ssl sso ssr sss