upist puist uipst iupst piust ipust upsit pusit uspit supit psuit spuit uispt iuspt usipt suipt isupt siupt pisut ipsut psiut spiut isput siput upits puits uipts iupts piuts iputs uptis putis utpis tupis ptuis tpuis uitps iutps utips tuips itups tiups pitus iptus ptius tpius itpus tipus upsti pusti uspti supti psuti sputi uptsi putsi utpsi tupsi ptusi tpusi ustpi sutpi utspi tuspi stupi tsupi pstui sptui ptsui tpsui stpui tspui uistp iustp usitp suitp isutp siutp uitsp iutsp utisp tuisp itusp tiusp ustip sutip utsip tusip stuip tsuip istup situp itsup tisup stiup tsiup pistu ipstu psitu spitu isptu siptu pitsu iptsu ptisu tpisu itpsu tipsu pstiu sptiu ptsiu tpsiu stpiu tspiu istpu sitpu itspu tispu stipu tsipu
Note: these 'words' (valid or invalid) are all the permutations of the word upist. These words are obtained by scrambling the letters in upist.