shtup hstup sthup tshup htsup thsup shutp hsutp suhtp ushtp hustp uhstp stuhp tsuhp suthp usthp tushp utshp htusp thusp hutsp uhtsp tuhsp uthsp shtpu hstpu sthpu tshpu htspu thspu shptu hsptu sphtu pshtu hpstu phstu stphu tsphu spthu psthu tpshu ptshu htpsu thpsu hptsu phtsu tphsu pthsu shupt hsupt suhpt ushpt huspt uhspt shput hsput sphut pshut hpsut phsut supht uspht spuht psuht upsht pusht hupst uhpst hpust phust uphst puhst stuph tsuph sutph ustph tusph utsph stpuh tspuh sptuh pstuh tpsuh ptsuh supth uspth sputh psuth upsth pusth tupsh utpsh tpush ptush uptsh putsh htups thups hutps uhtps tuhps uthps htpus thpus hptus phtus tphus pthus hupts uhpts hputs phuts uphts puhts tuphs utphs tpuhs ptuhs upths puths
Note: these 'words' (valid or invalid) are all the permutations of the word shtup. These words are obtained by scrambling the letters in shtup.