c-cd cccc cccp ccdc ccdn ccdp ccnc ccnp ccoc ccod ccpn ccpp cdnc cdon cnco cncp cndd cndp coco cocp codd con- conc cond conn cono cood coon coop copd copo copp cppd dccc dccp dcon dcop dcpo dddd ddoc ddpo dnoc dnpo doco dod- dodd dodo donc dond donn dono donp dood doon doop dopo dopp dpcp dppc nccc nccn nccp ncdc ncdn ncnc ncnd ncoc ncpc ndcc ndcp nddo ndnp ndoc ndop ndpd nnnn noco nodo non- nonn nono noo- noon nooo noop npcc nppc nppd occc occn ocon ocpd ocpp oddd odon odoo odop onc- oncd onco ondo onno onod onon oooo opo- opon oppo pccc pcod pcpn pcpp pdcp pdoc pdpn pnon pnpo pnpp pocd poco pod- podd podo ponc pond pono ponp pood poon poop pop- popc popo popp ppcc ppcd ppod pppd pppn pppo pppp