-er c-- ccc cce cck ccm ccr ccv ce- cec cee cek cem cer cev ckc ckm cmc cme cmk cmm cmr cmv crc cre crk crm crr crv cvc cve cvk cvm cvr cvv ec- ecc ece eck ecm ecr ecv eec eee eek eem eer eev ekc eke ekr ekv em- emc eme emk emm emr emv erc ere erk erm err erv evc eve evm evr evv kcc kce kck kcm kcr ke- kec kee kek kem ker kev kkc kke kkk kkm kkr kkv kmc kme kmk kmm krc krk krr krv kvk kvm kvr kvv m-r m-v mc- mcc mce mck mcm mcr mcv mec mee mek mem mer mev mkc mke mkk mkm mkr mkv mmc mme mmk mmm mmr mmv mrc mre mrk mrm mrr mrv mvc mve mvm mvr mvv rcc rce rcm rcr rcv re- rec ree rek rem rer rev rkc rke rkk rkm rkv rmc rme rmm rmr rmv rrc rrk rrm rrr rvc rve rvm rvr rvv v-e vcc vce vcm vcr vec vee vek vem ver vkm vm- vmc vmm vmr vrc vre vrk vrm vrr vvc vvm vvr vvv