c-cd cccc cccp cccu ccdc ccdn ccdp ccnc ccnp ccnu ccoc ccod ccpn ccpp ccuc ccup cdnc cdon ckck ckco ckdo ckdu cknc ckoc ckoo ckpc cnco cncp cndd cndp cock coco cocp cocu codd cok- coko con- conc cond conk conn cono cood cook coon coop copd copo copp coud couk coun coup cpcu cppd cucc cuck cucn cuk- cund cuno cunp cuon cupo cupp dccc dccp dccu dcon dcop dcpo dcup dddd ddoc ddpo dkdc dnoc dnpo dnuk dock doco docu dod- dodd dodo doko donc dond donk donn dono donp dood dook doon doop dopo dopp douc doud douk doun doup dpcp dppc duck duco dudd dudo dudu duku dunc dunk dunn duno duo- duon dupo kccc kccd kcck kccu kcdc kcdd kcdu kckc kckk kckn kcko kcnd kcno kcnp kcon kcou kcpc kcpn kcpo kcpu kcuk kcup kdcc kdcd kdco kddc kddd kddk kdkd kdkk kdkn kdko kdnd kdnk kdnn kdno kdoc kdok kduc kdun kdup kkcd kkck kkcn kkco kkdc kkdd kkdo kkkk kknd kknn kkno kknu kkon kkoo kkpc kkpk kkpn kkup kkuu knck kncn knco kncu kndc kndd kndk kndn kndo kndp kndu knkk knnd knnk knoc knod knok knon knop knou knpc knud knuk kocd kock kocn kocp kodk kodo kodu kokc kokk kokn koko kokp koku konc kond konk kono konp kooc kook koon kooo koop koou kopn kopp kopu kouu kpcc kpdc kpdo kpkk kpnc kpnd kpno kpnp kpoc kpod kpok kpoo kpop kpou kppc kppd kppk kppo kppp kucc kucd kuco kucp kudd kudo kudu kukk kukn kuku kunc kund kunk kuno kunp kunu kuok kuon kuoo kuop kupd kupu kuuk kuuu n-up nccc nccn nccp nccu ncdc ncdn ncdu ncnc ncnd ncoc ncpc ncuk ndcc ndcp nddo ndnp ndoc ndop ndpd nkok nnnn nock noco nodo nodu noko non- nonn nono nonu noo- nook noon nooo noop noun noup npcc nppc nppd nuck nucu nudc nudd nudo nuku nunc nunk nunn nuno nuoc nuon nuuk occc occn ocon ocpd ocpp oddd odon odoo odop odou okcu okko okno okok okon okpo okun onc- oncd onco ondo onkp onno onod onon onpu onup ooku oooo opo- opon oppo oucc oudc oun- ound ouu- pccc pcod pcpn pcpp pcun pdcp pdoc pdpn pnkd pnkp pnon pnpo pnpp pnup pocd pock poco pod- podd podo podu poko poku ponc pond ponk pono ponp pood pook poon poop pop- popc popo popp poud pouk poun poup ppcc ppcd ppdk ppod pppd pppn pppo pppp puck pudo pudu puku punc pund punk puno punu pupu puuc uccp ucdc ucdd ucon udon udoo udop udpd uduk udun ukcc ukko uknc ukok ukon ukup uncc unco uncp undo unkn unko unno unon unop unpc uocc updo upnp upon uppc uppp uppu upup uucp uuno uuoc uuuu