c-cd cccc cccf cccu ccdc ccdf ccdn ccfc ccfd ccff ccnc ccnf ccnu ccoc ccod ccuc cdnc cdnf cdon cfcf cfcn cfco cfun cnco cndd coco cocu codd cofc coff con- conc cond conf conn cono cood coof coon coud coun cucc cucn cufc cuff cufo cund cuno cuon dccc dccu dcfc dcon dddd ddoc dfcc dfco dfcu dnoc doco docu dod- dodd dodo doff donc dond donn dono dood doof doon douc doud douf doun duco dudd dudo dudu dufc duff dufu dunc dunn duno duo- duon fccf fdoc ffcc ffff ffun fndd fndn fnuf foco fofo fond fono food foof foon foud foun fuc- fudd fufc fuff fufu fund funf nccc nccf nccn nccu ncdc ncdn ncdu ncfc ncnc ncnd ncoc ndcc nddo ndoc nfcu nfdc nfff nfon nnnn noco nodo nodu non- nonn nono nonu noo- noon nooo noun nucu nudc nudd nudo nuff nunc nunn nuno nuoc nuon occc occn ocon oddd odon odoo odou off- offc offo offu ofno onc- oncd oncf onco ondo onno onod onon ooff oooo oucc oudc oufc ouff oun- ound ouu- ucdc ucdd ucon udon udoo udun ufcu uncc uncf unco undo unfd unno unon uocc uofo uuno uuoc uuuu