ruses urses rsues srues usres sures ruess uress reuss eruss uerss eurss rseus sreus resus ersus serus esrus users suers uesrs eusrs seurs esurs russe ursse rsuse sruse usrse surse russe ursse rsuse sruse usrse surse rssue srsue rssue srsue ssrue ssrue ussre susre ussre susre ssure ssure ruess uress reuss eruss uerss eurss ruses urses rsues srues usres sures resus ersus rseus sreus esrus serus uesrs eusrs users suers esurs seurs rsesu sresu ressu erssu sersu esrsu rsseu srseu rsseu srseu ssreu ssreu ressu erssu rsesu sresu esrsu sersu sesru essru sseru sseru essru sesru usesr suesr uessr eussr seusr esusr usser suser usser suser ssuer ssuer uessr eussr usesr suesr esusr seusr sesur essur sseur sseur essur sesur
Note: these 'words' (valid or invalid) are all the permutations of the word ruses. These words are obtained by scrambling the letters in ruses.