c-- ccc ccd ccn cco ccw cdc cdd cdn cdo cdw cn- cnc cnd cnn cno cnw co- coc cod con coo cow cw- cwc cwd cwn cwo dcc dcd dcn dco dcw ddc ddd ddn ddo ddw dnc dnd dnn dno dnw doc dod don doo dow dwc dwn dwo dww ncc ncd ncn nco ncw ndc ndd ndn ndo nnc nnn nno nnw no- noc nod non noo now nwc nwd nwn nwo oc- occ ocd ocn oco ocw odc odd odn odo on- onc ond onn ono oo- ooc ood oon ooo oow owc owd own owo oww wcc wcd wcn wco wcw wdc wn- wnc wnd wnn wno wnw woc wod won woo wow wwc wwd wwn wwo www