cccc cccf ccfc ccff ccnc ccnf ccoc cfcf cfcn cfco ckck ckco cknc ckoc ckoo cnco cock coco cofc coff cok- coko con- conc conf conk conn cono coof cook coon f--k fccf ffcc ffff fock foco fofo fono foof fook foon kccc kcck kcfc kcfn kcfo kckc kckf kckk kckn kcko kcno kcof kcon kfcf kfco kfff kffk kffn kfnc kfnf kfnk kfnn kfno kfok kfon kfoo kkck kkcn kkco kkfn kkkk kknn kkno kkon kkoo knck kncn knco knfo knkk knnk knoc knok knon kocf kock kocn kofc koff kofk kofo kokc kokf kokk kokn koko konc konk kono kooc kook koon kooo nccc nccf nccn ncfc ncnc ncoc nfff nfon nkfc nkok nnnn nock noco noko non- nonn nono noo- nook noon nooo occc occn ocon off- offc offo ofno okko okno okok okon onc- oncf onco onno onon ooff oooo