cccc cccv ccnc ccoc ccvo ckck ckco ckcv cknc ckoc ckoo ckvo cnco cock coco cok- coko con- conc conk conn cono conv cook coon covo cvcc kccc kcck kccv kckc kckk kckn kcko kckv kcno kcnv kcon kcvk kcvo kcvv kkck kkcn kkco kkkk kknn kkno kkon kkoo kkov kkvv knck kncn knco knkk knnk knoc knok knon knvn knvo kock kocn kokc kokk kokn koko konc konk kono kooc kook koon kooo koov kovc kovk kovo kvcc kvck kvco kvcv kvnc kvnn kvno kvoc kvok kvon kvoo kvov kvvn kvvv nccc nccn ncnc ncoc nkok nnnn nock noco noko non- nonn nono noo- nook noon nooo noov nov- novo nvcc occc occn ocon okko okno okok okon onc- onco onno onon oooo ovo- ovon ovoo vcon vonk vonn vooc vovk vvvv