senna esnna snena nsena ensna nesna senna esnna snena nsena ensna nesna snnea nsnea snnea nsnea nnsea nnsea ennsa nensa ennsa nensa nnesa nnesa senan esnan snean nsean ensan nesan seann esann saenn asenn easnn aesnn snaen nsaen sanen asnen nasen ansen enasn neasn eansn aensn naesn anesn senan esnan snean nsean ensan nesan seann esann saenn asenn easnn aesnn snaen nsaen sanen asnen nasen ansen enasn neasn eansn aensn naesn anesn snnae nsnae snnae nsnae nnsae nnsae snane nsane sanne asnne nasne ansne snane nsane sanne asnne nasne ansne nnase nnase nanse annse nanse annse ennas nenas ennas nenas nneas nneas enans neans eanns aenns naens anens enans neans eanns aenns naens anens nnaes nnaes nanes annes nanes annes
Note: these 'words' (valid or invalid) are all the permutations of the word senna. These words are obtained by scrambling the letters in senna.