siler isler slier lsier ilser liser sielr iselr seilr esilr ieslr eislr sleir lseir selir eslir lesir elsir ilesr liesr ielsr eilsr leisr elisr silre islre slire lsire ilsre lisre sirle isrle srile rsile irsle risle slrie lsrie srlie rslie lrsie rlsie ilrse lirse irlse rilse lrise rlise sierl iserl seirl esirl iesrl eisrl sirel isrel sriel rsiel irsel risel seril esril sreil rseil ersil resil iersl eirsl iresl riesl erisl reisl sleri lseri selri eslri lesri elsri slrei lsrei srlei rslei lrsei rlsei serli esrli sreli rseli ersli resli lersi elrsi lresi rlesi erlsi relsi ilers liers ielrs eilrs leirs elirs ilres lires irles riles lries rlies ierls eirls irels riels erils reils leris elris lreis rleis erlis relis
Note: these 'words' (valid or invalid) are all the permutations of the word siler. These words are obtained by scrambling the letters in siler.