fifty iffty ffity ffity iffty fifty fitfy iftfy ftify tfify itffy tiffy fftiy fftiy ftfiy tffiy ftfiy tffiy iftfy fitfy itffy tiffy ftify tfify fifyt iffyt ffiyt ffiyt iffyt fifyt fiyft ifyft fyift yfift iyfft yifft ffyit ffyit fyfit yffit fyfit yffit ifyft fiyft iyfft yifft fyift yfift fityf iftyf ftiyf tfiyf itfyf tifyf fiytf ifytf fyitf yfitf iyftf yiftf ftyif tfyif fytif yftif tyfif ytfif ityff tiyff iytff yitff tyiff ytiff fftyi fftyi ftfyi tffyi ftfyi tffyi ffyti ffyti fyfti yffti fyfti yffti ftyfi tfyfi fytfi yftfi tyffi ytffi ftyfi tfyfi fytfi yftfi tyffi ytffi iftyf fityf itfyf tifyf ftiyf tfiyf ifytf fiytf iyftf yiftf fyitf yfitf ityff tiyff iytff yitff tyiff ytiff ftyif tfyif fytif yftif tyfif ytfif
Note: these 'words' (valid or invalid) are all the permutations of the word fifty. These words are obtained by scrambling the letters in fifty.