TTFN TTFN TFTN FTTN TFTN FTTN TTNF TTNF TNTF NTTF TNTF NTTF TFNT FTNT TNFT NTFT FNTT NFTT TFNT FTNT TNFT NTFT FNTT NFTT
Note: these 'words' (valid or invalid) are all the permutations of the word TTFN. These words are obtained by scrambling the letters in TTFN.