froes rfoes fores ofres rofes orfes freos rfeos feros efros refos erfos foers ofers feors efors oefrs eofrs roefs orefs reofs erofs oerfs eorfs frose rfose forse ofrse rofse orfse frsoe rfsoe fsroe sfroe rsfoe srfoe fosre ofsre fsore sfore osfre sofre rosfe orsfe rsofe srofe osrfe sorfe freso rfeso ferso efrso refso erfso frseo rfseo fsreo sfreo rsfeo srfeo fesro efsro fsero sfero esfro sefro resfo ersfo rsefo srefo esrfo serfo foesr ofesr feosr efosr oefsr eofsr foser ofser fsoer sfoer osfer sofer fesor efsor fseor sfeor esfor sefor oesfr eosfr osefr soefr esofr seofr roesf oresf reosf erosf oersf eorsf rosef orsef rsoef sroef osref soref resof ersof rseof sreof esrof serof oesrf eosrf oserf soerf esorf seorf
Note: these 'words' (valid or invalid) are all the permutations of the word froes. These words are obtained by scrambling the letters in froes.