rotan ortan rtoan troan otran toran roatn oratn raotn arotn oartn aortn rtaon traon raton arton taron atron otarn toarn oatrn aotrn taorn atorn rotna ortna rtona trona otrna torna ronta ornta rnota nrota onrta norta rtnoa trnoa rntoa nrtoa tnroa ntroa otnra tonra ontra notra tnora ntora roant orant raont aront oarnt aornt ronat ornat rnoat nroat onrat norat ranot arnot rnaot nraot anrot narot oanrt aonrt onart noart anort naort rtano trano ratno artno tarno atrno rtnao trnao rntao nrtao tnrao ntrao ranto arnto rnato nrato anrto narto tanro atnro tnaro ntaro antro natro otanr toanr oatnr aotnr taonr atonr otnar tonar ontar notar tnoar ntoar oantr aontr onatr noatr anotr naotr tanor atnor tnaor ntaor antor nator
Note: these 'words' (valid or invalid) are all the permutations of the word rotan. These words are obtained by scrambling the letters in rotan.