c-- ccc cce ccf ccm ccn cco ce- cec cee cef cem cen ceo cfc cfe cff cfm cfn cfo cmc cme cmf cmm cmn cmo cn- cnc cne cnf cnm cnn cno co- coc coe cof com con coo ec- ecc ece ecf ecm ecn eco eec eee eef eem een eeo ef- efc efe eff efm efo em- emc eme emf emm emn emo en- enc ene enf enm enn eno eo- eoc eoe eof eom eon eoo fcc fce fcf fcm fcn fco fec fee fef fem fen feo ffc ffe fff ffm ffn ffo fmc fme fmf fmm fmn fmo fnc fne fnf fnm fnn foc foe fof fom fon foo m-f m-o mc- mcc mce mcf mcm mcn mco mec mee mef mem men meo mfc mfe mff mfm mfn mfo mmc mme mmf mmm mmn mmo mnc mne mnf mnm mnn mno moc moe mof mom mon moo ncc nce ncf ncm ncn nco ne- nec nee nef nem nen neo nfc nfe nff nfn nfo nmc nme nmm nmn nmo nnc nne nnf nnm nnn nno no- noc noe nof nom non noo oc- occ ocf ocm ocn oco oec oee oef oem oen oeo of- ofc ofe off ofm ofn ofo om- omc ome omf omm omn omo on- onc one onf onn ono oo- ooc oof oom oon ooo