-er c-- ccc cce cck ccm cco ccr ccu ccv ce- cec cee cek cem ceo cer ceu cev ckc ckm cko cmc cme cmk cmm cmo cmr cmu cmv co- coc coe cok com coo cor cou cov crc cre crk crm cro crr cru crv cuc cue cuk cum cuo cur cuu cuv cvc cve cvk cvm cvo cvr cvu cvv ec- ecc ece eck ecm eco ecr ecu ecv eec eee eek eem eeo eer eev ekc eke eko ekr eku ekv em- emc eme emk emm emo emr emu emv eo- eoc eoe eok eom eoo eor eou erc ere erk erm ero err eru erv eu- euc eue eur euv evc eve evm evo evr evv kcc kce kck kcm kcr kcu ke- kec kee kek kem keo ker kev kkc kke kkk kkm kkr kku kkv kmc kme kmk kmm kmo kmu koc koe kok kom koo kor kou krc krk kro krr kru krv kuc kue kuk kum kur kuu kvk kvm kvo kvr kvv m-o m-r m-v mc- mcc mce mck mcm mco mcr mcu mcv mec mee mek mem meo mer meu mev mkc mke mkk mkm mko mkr mku mkv mmc mme mmk mmm mmo mmr mmu mmv moc moe mok mom moo mor mou mov mrc mre mrk mrm mro mrr mru mrv muc mue muk mum mur muu mvc mve mvm mvo mvr mvv oc- occ ock ocm oco ocr ocu ocv oec oee oem oeo oer okc oke okk oko okr oku om- omc ome omm omo omr omu omv oo- ooc ook oom ooo oor oov or- orc ore ork orm oro orr oru orv ou- ouc oue ouk oum ouo our ov- ovc ove ovo ovv rcc rce rcm rco rcr rcu rcv re- rec ree rek rem reo rer reu rev rkc rke rkk rkm rko rku rkv rmc rme rmm rmo rmr rmv roc roe rok rom roo ror rou rov rrc rrk rrm rrr rru ruc rue ruk rum ruo rur ruu ruv rvc rve rvm rvo rvr rvu rvv ucc uce uck ucm uco ucr ucu ucv uec uee uem uer ukc uke ukk ukr uku um- umc ume umm umo umr umu uoc uoe uok uom uoo uor ur- urc ure urk urm uro urr uru uuc uue uum uur uuu uvc uve uvm uvo uvu uvv v-e vcc vce vcm vco vcr vcu vec vee vek vem veo ver veu vkm vm- vmc vmm vmo vmr vmu voc voe vok vom voo vor vou vov vrc vre vrk vrm vrr vru vue vuk vum vur vuv vvc vvm vvo vvr vvv