cccc cccf cccl ccfc ccff ccfl cclc ccoc cfcf cfcl cfco ckck ckcl ckco cklf ckoc ckoo clof clok cloo cock coco cofc coff cok- coko col- colk coll colo coof cook cool f--k fccf ffcc ffff flcl floc flok floo fock foco fofo folc folk foll folo foof fook fool k-lo kccc kcck kccl kcfc kcfl kcfo kckc kckf kckk kckl kcko kclc kclf kclk kcll kcof kcol kfcf kfco kfff kffk kflc kflf kfll kflo kfok kfoo kkck kkcl kkco kkkk kklc kklf kkll kklo kkol kkoo klcc klck klcl klfc klff klkc klkk klkl klko kllc kllk kloc klok klol kloo kocf kock kofc koff kofk kofo kokc kokf kokk koko kolc kolf kolk koll kolo kooc kook kool kooo lccc lcfc lfcc llcc lllc llll lloc lloo locc lock loco loff lokk loko loll lolo looc loof look lool occc oclc ofcl off- offc offo okko oklo okok okol olcc ollo olof ooff oolo oooo