c-- ccc ccd cch ccn cco cdc cdd cdh cdn cdo ch- chc chd chh chn cho cn- cnc cnd cnh cnn cno co- coc cod coh con coo dcc dcd dcn dco ddc ddd ddh ddn ddo dh- dhc dhd dhh dho dnc dnd dnh dnn dno doc dod doh don doo hcc hcd hch hcn hco hdc hdd hdh hdn hdo hhc hhd hhh hhn hho hnc hnd hnh hnn hno hoc hod hoh hon hoo ncc ncd nch ncn nco ndc ndd ndh ndn ndo nhc nhd nhh nhn nnc nnh nnn nno no- noc nod noh non noo oc- occ ocd och ocn oco odc odd odh odn odo ohc ohd ohh ohn oho on- onc ond onh onn ono oo- ooc ood ooh oon ooo