c-- ccc ccm ccn cco ccx cmc cmm cmn cmo cmx cmy cn- cnc cnm cnn cno cnx cny co- coc com con coo cox coy cxc cxo cxx cyc cym cyn cyo m-o mc- mcc mcm mcn mco mcx mmc mmm mmn mmo mmx mnc mnm mnn mno moc mom mon moo mox moy mxc mxn my- myc mym myn myo myx ncc ncm ncn nco ncx nmc nmm nmn nmo nnc nnm nnn nno no- noc nom non noo nox noy nxc nyc nym nyn nyo nyx nyy oc- occ ocm ocn oco ocx om- omc omm omn omo omx omy on- onc onn ono onx ony oo- ooc oom oon ooo oox ox- oxc oxn oxo oxx oxy oyo xcx xmc xmm xmo xmx xnc xno xoc xom xon xoo xox xxo xxx xxy xyy ycc yco ycy ymc ymm ymo ynn yny yoc yom yon yoo yox yoy yxy yyc yyy