tiles itles tlies lties iltes lites tiels itels teils etils ietls eitls tleis lteis telis etlis letis eltis ilets liets ielts eilts leits elits tilse itlse tlise ltise iltse litse tisle itsle tsile stile istle sitle tlsie ltsie tslie stlie lstie sltie ilste liste islte silte lsite slite tiesl itesl teisl etisl ietsl eitsl tisel itsel tsiel stiel istel sitel tesil etsil tseil steil estil setil iestl eistl isetl sietl esitl seitl tlesi ltesi telsi etlsi letsi eltsi tlsei ltsei tslei stlei lstei sltei tesli etsli tseli steli estli setli lesti elsti lseti sleti eslti selti ilest liest ielst eilst leist elist ilset liset islet silet lsiet sliet ieslt eislt iselt sielt esilt seilt lesit elsit lseit sleit eslit selit
Note: these 'words' (valid or invalid) are all the permutations of the word tiles. These words are obtained by scrambling the letters in tiles.