spilt psilt siplt isplt pislt ipslt split pslit slpit lspit plsit lpsit silpt islpt slipt lsipt ilspt lispt pilst iplst plist lpist ilpst lipst spitl psitl siptl isptl pistl ipstl sptil pstil stpil tspil ptsil tpsil sitpl istpl stipl tsipl itspl tispl pitsl iptsl ptisl tpisl itpsl tipsl splti pslti slpti lspti plsti lpsti sptli pstli stpli tspli ptsli tpsli sltpi lstpi stlpi tslpi ltspi tlspi pltsi lptsi ptlsi tplsi ltpsi tlpsi siltp isltp slitp lsitp ilstp listp sitlp istlp stilp tsilp itslp tislp sltip lstip stlip tslip ltsip tlsip iltsp litsp itlsp tilsp ltisp tlisp pilts iplts plits lpits ilpts lipts pitls iptls ptils tpils itpls tipls pltis lptis ptlis tplis ltpis tlpis iltps litps itlps tilps ltips tlips
Note: these 'words' (valid or invalid) are all the permutations of the word spilt. These words are obtained by scrambling the letters in spilt.