-er c-- ccc cce ccf ccm ccn cco ccr ce- cec cee cef cem cen ceo cer cfc cfe cff cfm cfn cfo cfr cmc cme cmf cmm cmn cmo cmr cn- cnc cne cnf cnm cnn cno cnr co- coc coe cof com con coo cor crc cre crf crm crn cro crr ec- ecc ece ecf ecm ecn eco ecr eec eee eef eem een eeo eer ef- efc efe eff efm efo efr em- emc eme emf emm emn emo emr en- enc ene enf enm enn eno enr eo- eoc eoe eof eom eon eoo eor erc ere erf erm ern ero err fcc fce fcf fcm fcn fco fcr fec fee fef fem fen feo fer ffc ffe fff ffm ffn ffo ffr fmc fme fmf fmm fmn fmo fmr fnc fne fnf fnm fnn fnr foc foe fof fom fon foo for frc fre frf frm frn fro frr m-f m-o m-r mc- mcc mce mcf mcm mcn mco mcr mec mee mef mem men meo mer mfc mfe mff mfm mfn mfo mfr mmc mme mmf mmm mmn mmo mmr mnc mne mnf mnm mnn mno mnr moc moe mof mom mon moo mor mrc mre mrf mrm mrn mro mrr ncc nce ncf ncm ncn nco ncr ne- nec nee nef nem nen neo ner nfc nfe nff nfn nfo nfr nmc nme nmm nmn nmo nmr nnc nne nnf nnm nnn nno no- noc noe nof nom non noo nor nrc nre nrf nrm nrn nro nrr oc- occ ocf ocm ocn oco ocr oec oee oef oem oen oeo oer of- ofc ofe off ofm ofn ofo ofr om- omc ome omf omm omn omo omr on- onc one onf onn ono onr oo- ooc oof oom oon ooo oor or- orc ore orf orm orn oro orr rcc rce rcf rcm rcn rco rcr re- rec ree ref rem ren reo rer rfc rfe rff rfm rfn rfo rfr rmc rme rmf rmm rmn rmo rmr rnc rnm rnn rno rnr roc roe rof rom ron roo ror rrc rrf rrm rrn rrr