f--k ffff flok floo flow fofo folk foll folo foof fook fool fowk fowl k-lo kfff kffk kflf kfll kflo kflw kfok kfoo kkkk kklf kkll kklo kkol kkoo kkow kkwf kkwk klff klkk klkl klko kllk klok klol kloo klow klwl klwo koff kofk kofo kokf kokk koko kolf kolk koll kolo kolw kook kool kooo kowl kwfl kwkk kwkw kwlf kwlk kwof kwok kwol kwow kwwf kwwk kwwl llll lloo loff lokk loko loll lolo loof look lool lowk lowl loww lwoo lwow off- offo okko oklo okok okol ollo olof ooff oolo oooo owlk owow wfff wfkl wflf wflk wfll wflo wflw wfwl wfwo wkff wkfl wkkf wkkl wkko wkkw wklk wkll wklo wkok wkol wkoo wkow wkwf wkwl wlff wlfk wlfl wlfw wlkf wlkk wlkl wlko wlkw wllf wlll wllw wlof wlok wlol wloo wlwf wlwk wlwl woff wofl wokk wokl woko wokw wolf wolk woll wolw woof wook wool woow wowf wowl wowo woww wwfl wwfw wwkf wwkl wwlf wwlk wwll wwlw wwof wwol wwow wwwk wwwl wwww