-er c-- ccc cce cck ccm ccn cco ccr ce- cec cee cek cem cen ceo cer ckc ckm cko cmc cme cmk cmm cmn cmo cmr cn- cnc cne cnm cnn cno cnr co- coc coe cok com con coo cor crc cre crk crm crn cro crr ec- ecc ece eck ecm ecn eco ecr eec eee eek eem een eeo eer ekc eke eko ekr em- emc eme emk emm emn emo emr en- enc ene enk enm enn eno enr eo- eoc eoe eok eom eon eoo eor erc ere erk erm ern ero err kcc kce kck kcm kcn kcr ke- kec kee kek kem ken keo ker kkc kke kkk kkm kkn kkr kmc kme kmk kmm kmo kn- knc kne knk knm knn kno knr koc koe kok kom kon koo kor krc krk krn kro krr m-o m-r mc- mcc mce mck mcm mcn mco mcr mec mee mek mem men meo mer mkc mke mkk mkm mkn mko mkr mmc mme mmk mmm mmn mmo mmr mnc mne mnk mnm mnn mno mnr moc moe mok mom mon moo mor mrc mre mrk mrm mrn mro mrr ncc nce nck ncm ncn nco ncr ne- nec nee nek nem nen neo ner nkc nke nkk nkm nkn nko nkr nmc nme nmk nmm nmn nmo nmr nnc nne nnk nnm nnn nno no- noc noe nok nom non noo nor nrc nre nrk nrm nrn nro nrr oc- occ ock ocm ocn oco ocr oec oee oem oen oeo oer okc oke okk oko okr om- omc ome omm omn omo omr on- onc one onk onn ono onr oo- ooc ook oom oon ooo oor or- orc ore ork orm orn oro orr rcc rce rcm rcn rco rcr re- rec ree rek rem ren reo rer rkc rke rkk rkm rko rmc rme rmm rmn rmo rmr rnc rnm rnn rno rnr roc roe rok rom ron roo ror rrc rrk rrm rrn rrr