-er c-- ccc cce ccg cck cco ccr ccs ccu ccv ce- cec cee ceg cek ceo cer ces ceu cev cgc cge cgg cgo cgr cgs cgu cgv ckc cko cks co- coc coe cog cok coo cor cos cou cov crc cre crg crk cro crr crs cru crv csc cse csg csk cso csr css csu csv cuc cue cug cuk cuo cur cus cuu cuv cvc cve cvg cvk cvo cvr cvs cvu cvv ec- ecc ece ecg eck eco ecr ecs ecu ecv eec eee eeg eek eeo eer ees eev egc ege egg ego egr egs egu ekc eke ekg eko ekr eks eku ekv eo- eoc eoe eog eok eoo eor eos eou erc ere erg erk ero err ers eru erv es- esc ese esg esk eso esr ess esu esv eu- euc eue eug eur eus euv evc eve evg evo evr evs evv gcc gce gcg gck gco gcr gcs gcu ge- gec gee geg gek geo ger ges geu gev ggc ggg ggo ggr ggs ggu ggv gko gks goc goe gog gok goo gor gos gou gov grc gre grg grk gro grr grs gru grv gsc gse gsg gsk gso gsr gss gsu gsv gu- guc gue gug guk guo gur gus guu guv gvc gve gvg gvk gvo gvr gvs gvu kcc kce kcg kck kcr kcs kcu ke- kec kee keg kek keo ker kes kev kgc kgo kgs kgu kgv kkc kke kkk kkr kks kku kkv koc koe kog kok koo kor kos kou krc krg krk kro krr krs kru krv ksc kse ksg ksk kso ksr kss ksu ksv kuc kue kug kuk kur kus kuu kvk kvo kvr kvs kvv oc- occ ocg ock oco ocr ocs ocu ocv oec oee oeg oeo oer oes ogc oge ogg ogo ogs okc oke okg okk oko okr oks oku oo- ooc oog ook ooo oor oos oov or- orc ore org ork oro orr ors oru orv os- osc ose osg osk oso osr oss osu osv ou- ouc oue ouk ouo our ous ov- ovc ove ovo ovs ovv rcc rce rcg rco rcr rcs rcu rcv re- rec ree reg rek reo rer res reu rev rgc rge rgg rgk rgo rgr rgs rgv rkc rke rkg rkk rko rks rku rkv roc roe rog rok roo ror ros rou rov rrc rrg rrk rrr rrs rru rsc rse rsg rsk rso rsr rss rsu rsv ruc rue rug ruk ruo rur rus ruu ruv rvc rve rvg rvo rvr rvs rvu rvv scc sce scg sck sco scr scs scu scv se- sec see seg sek seo ser ses seu sev sgc sge sgg sgk sgo sgr sgs sgu sgv sk- skc ske skg skk sko skr sks sku soc soe sog sok soo sor sos sou sov sr- src sre srg srk sro srr srs srv ss- ssc sse ssg ssk sso ssr sss ssu ssv suc sue sug suk suo sur sus suu suv svc sve svg svk svo svr svs svu svv ucc uce ucg uck uco ucr ucs ucu ucv uec uee ueg uer ues ugc uge ugg ugk ugo ugr ugs ugu ukc uke ukk ukr uku uoc uoe uog uok uoo uor uos ur- urc ure urg urk uro urr urs uru usc use usg usk uso usr uss usu usv uuc uue uug uur uus uuu uvc uve uvo uvs uvu uvv v-e vcc vce vco vcr vcs vcu vec vee veg vek veo ver ves veu vgc vgg vgo vgr vgs vgu vkg voc voe vog vok voo vor vos vou vov vrc vre vrg vrk vrr vrs vru vsc vse vsg vsk vso vsr vss vsu vsv vue vug vuk vur vus vuv vvc vvg vvo vvr vvs vvv