snuff nsuff sunff usnff nusff unsff snfuf nsfuf sfnuf fsnuf nfsuf fnsuf sufnf usfnf sfunf fsunf ufsnf fusnf nufsf unfsf nfusf fnusf ufnsf funsf snuff nsuff sunff usnff nusff unsff snfuf nsfuf sfnuf fsnuf nfsuf fnsuf sufnf usfnf sfunf fsunf ufsnf fusnf nufsf unfsf nfusf fnusf ufnsf funsf snffu nsffu sfnfu fsnfu nfsfu fnsfu snffu nsffu sfnfu fsnfu nfsfu fnsfu sffnu fsfnu sffnu fsfnu ffsnu ffsnu nffsu fnfsu nffsu fnfsu ffnsu ffnsu suffn usffn sfufn fsufn ufsfn fusfn suffn usffn sfufn fsufn ufsfn fusfn sffun fsfun sffun fsfun ffsun ffsun uffsn fufsn uffsn fufsn ffusn ffusn nuffs unffs nfufs fnufs ufnfs funfs nuffs unffs nfufs fnufs ufnfs funfs nffus fnfus nffus fnfus ffnus ffnus uffns fufns uffns fufns ffuns ffuns
Note: these 'words' (valid or invalid) are all the permutations of the word snuff. These words are obtained by scrambling the letters in snuff.