offer fofer offer fofer ffoer ffoer ofefr foefr oeffr eoffr feofr efofr ofefr foefr oeffr eoffr feofr efofr ffeor ffeor fefor effor fefor effor offre fofre offre fofre ffore ffore ofrfe forfe orffe roffe frofe rfofe ofrfe forfe orffe roffe frofe rfofe ffroe ffroe frfoe rffoe frfoe rffoe oferf foerf oefrf eofrf feorf eforf ofref foref orfef rofef froef rfoef oerff eorff oreff roeff eroff reoff ferof efrof freof rfeof erfof refof oferf foerf oefrf eofrf feorf eforf ofref foref orfef rofef froef rfoef oerff eorff oreff roeff eroff reoff ferof efrof freof rfeof erfof refof ffero ffero fefro effro fefro effro ffreo ffreo frfeo rffeo frfeo rffeo ferfo efrfo frefo rfefo erffo reffo ferfo efrfo frefo rfefo erffo reffo
Note: these 'words' (valid or invalid) are all the permutations of the word offer. These words are obtained by scrambling the letters in offer.