fifth iffth ffith ffith iffth fifth fitfh iftfh ftifh tfifh itffh tiffh fftih fftih ftfih tffih ftfih tffih iftfh fitfh itffh tiffh ftifh tfifh fifht iffht ffiht ffiht iffht fifht fihft ifhft fhift hfift ihfft hifft ffhit ffhit fhfit hffit fhfit hffit ifhft fihft ihfft hifft fhift hfift fithf ifthf ftihf tfihf itfhf tifhf fihtf ifhtf fhitf hfitf ihftf hiftf fthif tfhif fhtif hftif thfif htfif ithff tihff ihtff hitff thiff htiff ffthi ffthi ftfhi tffhi ftfhi tffhi ffhti ffhti fhfti hffti fhfti hffti fthfi tfhfi fhtfi hftfi thffi htffi fthfi tfhfi fhtfi hftfi thffi htffi ifthf fithf itfhf tifhf ftihf tfihf ifhtf fihtf ihftf hiftf fhitf hfitf ithff tihff ihtff hitff thiff htiff fthif tfhif fhtif hftif thfif htfif
Note: these 'words' (valid or invalid) are all the permutations of the word fifth. These words are obtained by scrambling the letters in fifth.