-er c-- ccc cce ccf cch cck cco ccr ccs ce- cec cee cef ceh cek ceo cer ces cfc cfe cff cfh cfk cfo cfr cfs ch- chc che chf chh chk cho chr chs ckc ckh cko cks co- coc coe cof coh cok coo cor cos crc cre crf crh crk cro crr crs csc cse csf csh csk cso csr css ec- ecc ece ecf ech eck eco ecr ecs eec eee eef eek eeo eer ees ef- efc efe eff efh efo efr efs ehc ehe ehf ehh eho ehr ehs ekc eke ekf ekh eko ekr eks eo- eoc eoe eof eoh eok eoo eor eos erc ere erf erh erk ero err ers es- esc ese esf esh esk eso esr ess fcc fce fcf fck fco fcr fcs fec fee fef feh fek feo fer fes ffc ffe fff ffh ffk ffo ffr ffs fhc fhe fhf fhh fho fhr fhs fkc fkf fkk foc foe fof foh fok foo for fos frc fre frf frh frk fro frr frs fsc fse fsf fsh fsk fso fsr fss hcc hce hcf hch hck hco hcr hcs he- hec hee hef heh hek heo her hes hfc hfe hff hfh hfk hfo hfr hfs hhc hhe hhf hhh hhk hho hhr hhs hkf hkh hkk hko hkr hks hoc hoe hof hoh hok hoo hor hos hr- hrc hre hrf hrh hrk hro hrr hrs hsc hse hsf hsh hsk hsr hss kcc kce kch kck kcr kcs ke- kec kee kef keh kek keo ker kes kfc kff kfh kfo kfs khe khf khh khk kho khr khs kkc kke kkh kkk kkr kks koc koe kof koh kok koo kor kos krc krf krk kro krr krs ksc kse ksf ksh ksk kso ksr kss oc- occ ocf och ock oco ocr ocs oec oee oef oeh oeo oer oes of- ofc ofe off ofo ofr ofs ohc ohe ohf ohh oho ohr ohs okc oke okk oko okr oks oo- ooc oof ooh ook ooo oor oos or- orc ore orf orh ork oro orr ors os- osc ose osf osh osk oso osr oss rcc rce rcf rch rco rcr rcs re- rec ree ref reh rek reo rer res rfc rfe rff rfh rfk rfo rfr rfs rh- rhc rhe rhf rhh rho rhr rhs rkc rke rkf rkk rko rks roc roe rof roh rok roo ror ros rrc rrf rrh rrk rrr rrs rsc rse rsf rsh rsk rso rsr rss scc sce scf sch sck sco scr scs se- sec see sef seh sek seo ser ses sfc sfe sff sfh sfk sfo sfr sfs sh- shc she shf shh shk sho shr shs sk- skc ske skf skh skk sko skr sks soc soe sof soh sok soo sor sos sr- src sre srf srh srk sro srr srs ss- ssc sse ssf ssh ssk sso ssr sss