spile psile siple isple pisle ipsle splie pslie slpie lspie plsie lpsie silpe islpe slipe lsipe ilspe lispe pilse iplse plise lpise ilpse lipse spiel psiel sipel ispel pisel ipsel speil pseil sepil espil pesil epsil siepl isepl seipl esipl iespl eispl piesl ipesl peisl episl iepsl eipsl splei pslei slpei lspei plsei lpsei speli pseli sepli espli pesli epsli slepi lsepi selpi eslpi lespi elspi plesi lpesi pelsi eplsi lepsi elpsi silep islep sliep lsiep ilsep lisep sielp iselp seilp esilp ieslp eislp sleip lseip selip eslip lesip elsip ilesp liesp ielsp eilsp leisp elisp piles iples plies lpies ilpes lipes piels ipels peils epils iepls eipls pleis lpeis pelis eplis lepis elpis ileps lieps ielps eilps leips elips
Note: these 'words' (valid or invalid) are all the permutations of the word spile. These words are obtained by scrambling the letters in spile.