rusas ursas rsuas sruas usras suras ruass urass rauss aruss uarss aurss rsaus sraus rasus arsus sarus asrus usars suars uasrs ausrs saurs asurs russa urssa rsusa srusa usrsa sursa russa urssa rsusa srusa usrsa sursa rssua srsua rssua srsua ssrua ssrua ussra susra ussra susra ssura ssura ruass urass rauss aruss uarss aurss rusas ursas rsuas sruas usras suras rasus arsus rsaus sraus asrus sarus uasrs ausrs usars suars asurs saurs rsasu srasu rassu arssu sarsu asrsu rssau srsau rssau srsau ssrau ssrau rassu arssu rsasu srasu asrsu sarsu sasru assru ssaru ssaru assru sasru usasr suasr uassr aussr sausr asusr ussar susar ussar susar ssuar ssuar uassr aussr usasr suasr asusr sausr sasur assur ssaur ssaur assur sasur
Note: these 'words' (valid or invalid) are all the permutations of the word rusas. These words are obtained by scrambling the letters in rusas.