dalek adlek dlaek ldaek aldek ladek daelk adelk dealk edalk aedlk eadlk dleak ldeak delak edlak ledak eldak aledk laedk aeldk ealdk leadk eladk dalke adlke dlake ldake aldke ladke dakle adkle dkale kdale akdle kadle dlkae ldkae dklae kdlae lkdae kldae alkde lakde aklde kalde lkade klade daekl adekl deakl edakl aedkl eadkl dakel adkel dkael kdael akdel kadel dekal edkal dkeal kdeal ekdal kedal aekdl eakdl akedl kaedl ekadl keadl dleka ldeka delka edlka ledka eldka dlkea ldkea dklea kdlea lkdea kldea dekla edkla dkela kdela ekdla kedla lekda elkda lkeda kleda eklda kelda alekd laekd aelkd ealkd leakd elakd alked laked akled kaled lkaed klaed aekld eakld akeld kaeld ekald keald lekad elkad lkead klead eklad kelad
Note: these 'words' (valid or invalid) are all the permutations of the word dalek. These words are obtained by scrambling the letters in dalek.