whist hwist wihst iwhst hiwst ihwst whsit hwsit wshit swhit hswit shwit wisht iwsht wsiht swiht iswht siwht hiswt ihswt hsiwt shiwt ishwt sihwt whits hwits wihts iwhts hiwts ihwts whtis hwtis wthis twhis htwis thwis withs iwths wtihs twihs itwhs tiwhs hitws ihtws htiws thiws ithws tihws whsti hwsti wshti swhti hswti shwti whtsi hwtsi wthsi twhsi htwsi thwsi wsthi swthi wtshi twshi stwhi tswhi hstwi shtwi htswi thswi sthwi tshwi wisth iwsth wsith swith iswth siwth witsh iwtsh wtish twish itwsh tiwsh wstih swtih wtsih twsih stwih tswih istwh sitwh itswh tiswh stiwh tsiwh histw ihstw hsitw shitw ishtw sihtw hitsw ihtsw htisw thisw ithsw tihsw hstiw shtiw htsiw thsiw sthiw tshiw isthw sithw itshw tishw stihw tsihw
Note: these 'words' (valid or invalid) are all the permutations of the word whist. These words are obtained by scrambling the letters in whist.