welds ewlds wleds lweds elwds lewds wedls ewdls wdels dwels edwls dewls wldes lwdes wdles dwles ldwes dlwes eldws ledws edlws delws ldews dlews welsd ewlsd wlesd lwesd elwsd lewsd wesld ewsld wseld sweld eswld sewld wlsed lwsed wsled swled lswed slwed elswd leswd eslwd selwd lsewd slewd wedsl ewdsl wdesl dwesl edwsl dewsl wesdl ewsdl wsedl swedl eswdl sewdl wdsel dwsel wsdel swdel dswel sdwel edswl deswl esdwl sedwl dsewl sdewl wldse lwdse wdlse dwlse ldwse dlwse wlsde lwsde wslde swlde lswde slwde wdsle dwsle wsdle swdle dswle sdwle ldswe dlswe lsdwe sldwe dslwe sdlwe eldsw ledsw edlsw delsw ldesw dlesw elsdw lesdw esldw seldw lsedw sledw edslw deslw esdlw sedlw dselw sdelw ldsew dlsew lsdew sldew dslew sdlew
Note: these 'words' (valid or invalid) are all the permutations of the word welds. These words are obtained by scrambling the letters in welds.