speld pseld sepld espld pesld epsld spled psled slped lsped plsed lpsed selpd eslpd slepd lsepd elspd lespd pelsd eplsd plesd lpesd elpsd lepsd spedl psedl sepdl espdl pesdl epsdl spdel psdel sdpel dspel pdsel dpsel sedpl esdpl sdepl dsepl edspl despl pedsl epdsl pdesl dpesl edpsl depsl splde pslde slpde lspde plsde lpsde spdle psdle sdple dsple pdsle dpsle sldpe lsdpe sdlpe dslpe ldspe dlspe pldse lpdse pdlse dplse ldpse dlpse seldp esldp sledp lsedp elsdp lesdp sedlp esdlp sdelp dselp edslp deslp sldep lsdep sdlep dslep ldsep dlsep eldsp ledsp edlsp delsp ldesp dlesp pelds eplds pleds lpeds elpds lepds pedls epdls pdels dpels edpls depls pldes lpdes pdles dples ldpes dlpes eldps ledps edlps delps ldeps dleps
Note: these 'words' (valid or invalid) are all the permutations of the word speld. These words are obtained by scrambling the letters in speld.