c-cd cccc cccu ccdc ccdn ccnc ccnu ccoc ccod ccuc cdnc cdon ckck ckco ckdo ckdu cknc ckoc ckoo cnco cndd cock coco cocu codd cok- coko con- conc cond conk conn cono cood cook coon coud couk coun cucc cuck cucn cuk- cund cuno cuon dccc dccu dcon dddd ddoc dkdc dnoc dnuk dock doco docu dod- dodd dodo doko donc dond donk donn dono dood dook doon douc doud douk doun duck duco dudd dudo dudu duku dunc dunk dunn duno duo- duon kccc kccd kcck kccu kcdc kcdd kcdu kckc kckk kckn kcko kcnd kcno kcon kcou kcuk kdcc kdcd kdco kddc kddd kddk kdkd kdkk kdkn kdko kdnd kdnk kdnn kdno kdoc kdok kduc kdun kkcd kkck kkcn kkco kkdc kkdd kkdo kkkk kknd kknn kkno kknu kkon kkoo kkuu knck kncn knco kncu kndc kndd kndk kndn kndo kndu knkk knnd knnk knoc knod knok knon knou knud knuk kocd kock kocn kodk kodo kodu kokc kokk kokn koko koku konc kond konk kono kooc kook koon kooo koou kouu kucc kucd kuco kudd kudo kudu kukk kukn kuku kunc kund kunk kuno kunu kuok kuon kuoo kuuk kuuu nccc nccn nccu ncdc ncdn ncdu ncnc ncnd ncoc ncuk ndcc nddo ndoc nkok nnnn nock noco nodo nodu noko non- nonn nono nonu noo- nook noon nooo noun nuck nucu nudc nudd nudo nuku nunc nunk nunn nuno nuoc nuon nuuk occc occn ocon oddd odon odoo odou okcu okko okno okok okon okun onc- oncd onco ondo onno onod onon ooku oooo oucc oudc oun- ound ouu- ucdc ucdd ucon udon udoo uduk udun ukcc ukko uknc ukok ukon uncc unco undo unkn unko unno unon uocc uuno uuoc uuuu