c-- ccc ccf ccm ccn cco ccs cfc cff cfm cfn cfo cfs cmc cmf cmm cmn cmo cms cn- cnc cnf cnm cnn cno cns co- coc cof com con coo cos csc csf csm csn cso css fcc fcf fcm fcn fco fcs ffc fff ffm ffn ffo ffs fmc fmf fmm fmn fmo fms fnc fnf fnm fnn fns foc fof fom fon foo fos fsc fsf fsm fsn fso fss m-f m-o mc- mcc mcf mcm mcn mco mcs mfc mff mfm mfn mfo mfs mmc mmf mmm mmn mmo mms mnc mnf mnm mnn mno mns moc mof mom mon moo mos msc msf msm msn mso mss ncc ncf ncm ncn nco ncs nfc nff nfn nfo nfs nmc nmm nmn nmo nms nnc nnf nnm nnn nno nns no- noc nof nom non noo nos nsc nsf nsm nsn nso nss oc- occ ocf ocm ocn oco ocs of- ofc off ofm ofn ofo ofs om- omc omf omm omn omo oms on- onc onf onn ono ons oo- ooc oof oom oon ooo oos os- osc osf osm osn oso oss scc scf scm scn sco scs sfc sff sfm sfn sfo sfs smc smf smm smn smo sms snc snf snm snn sno sns soc sof som son soo sos ss- ssc ssf ssm ssn sso sss