cccc ccnc ccny ccoc cctc cctt cnco cntc coco coct con- conc conn cono cont cony coon coot cotc cotn coto cott coty coyn coyo coyt ctot cttn cyc- cycc cyn- cyno cyon cyt- cyto cyy- cyyc cyyn nccc nccn ncct ncnc ncoc nctc nnnn nnot nntn noco noct non- nonn nono nont noo- noon nooo noot not- noto nott noyo noyt ntcc ntto nycc nyco nycy nynt nyny nyon nytc occc occn occt ocon oct- octo octy onc- onco onct onno onon onoy ont- ontc onto oont oooo ooty oto- oton otoo otoy otto oynt oyon tccc tcnn tcon tctc tncc to-y toco tonn tono tony toon toot totc toto tott toty toyn toyo toyt ttcn tton ttoy tttt tyco tynt tyny tyto tytt tyty tyyn yccc yctc ynon ynot yono yont yoon yoot yott yoyn yoyo yyyy