fowth ofwth fwoth wfoth owfth wofth fotwh oftwh ftowh tfowh otfwh tofwh fwtoh wftoh ftwoh tfwoh wtfoh twfoh owtfh wotfh otwfh towfh wtofh twofh fowht ofwht fwoht wfoht owfht wofht fohwt ofhwt fhowt hfowt ohfwt hofwt fwhot wfhot fhwot hfwot whfot hwfot owhft wohft ohwft howft whoft hwoft fothw ofthw ftohw tfohw otfhw tofhw fohtw ofhtw fhotw hfotw ohftw hoftw fthow tfhow fhtow hftow thfow htfow othfw tohfw ohtfw hotfw thofw htofw fwtho wftho ftwho tfwho wtfho twfho fwhto wfhto fhwto hfwto whfto hwfto fthwo tfhwo fhtwo hftwo thfwo htfwo wthfo twhfo whtfo hwtfo thwfo htwfo owthf wothf otwhf towhf wtohf twohf owhtf wohtf ohwtf howtf whotf hwotf othwf tohwf ohtwf hotwf thowf htowf wthof twhof whtof hwtof thwof htwof
Note: these 'words' (valid or invalid) are all the permutations of the word fowth. These words are obtained by scrambling the letters in fowth.