c-cd cccc ccdc ccdn ccnc ccoc ccod cctc cctt cdnc cdon cdot cnco cndd cntc coco coct codd con- conc cond conn cono cont cood coon coot cotc cotn coto cott ctot cttn dccc dcct dcon dctc dddd ddoc ddot dnoc dntt doco doct dod- dodd dodo donc dond donn dono dont dood doon doot dotd doto dott dtcc dtot nccc nccn ncct ncdc ncdn ncnc ncnd ncoc nctc ndcc nddo ndnt ndoc ndtc nnnn nnot nntn noco noct nodo non- nonn nono nont noo- noon nooo noot not- noto nott ntcc ntnd ntto occc occn occt ocon oct- octo oddd odon odoo odot onc- oncd onco onct ondo onno onod onon ont- ontc onto oont oooo otcd oto- oton otoo otto tccc tcdd tcnn tcon tctc tncc tndd toco todd todo todt tonn tono tood toon toot totc totd toto tott ttcn tton tttt