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