ffff flon floo flow fofo foll folo fono foof fool foon fowl llll llnw lloo loff lofn loll lolo lono loof lool loon lowl lown loww lwoo lwow nfff nfon nlow nnnn nolf noll nolo non- nonn nono nonw noo- nool noon nooo nowl nown off- offo ofno ollo olof olon onlf onno onon ooff oolo oooo owow wfff wffn wflf wfll wfln wflo wflw wfnf wfnl wfnn wfno wfnw wfon wfwl wfwn wfwo wlff wlfl wlfn wlfw wllf wlll wlln wllw wlnl wlno wlof wlol wlon wloo wlwf wlwl wnfl wnfn wnfo wnlf wnlo wnnf wnnl wnnw wnoo wnow wnwf wnwn wnww woff wofl wofn wolf woll wolw wonn wonw woof wool woon woow wowf wowl wown wowo woww wwfl wwfw wwlf wwll wwln wwlw wwnl wwnn wwno wwnw wwof wwol wwon wwow wwwl wwwn wwww