decka edcka dceka cdeka ecdka cedka dekca edkca dkeca kdeca ekdca kedca dckea cdkea dkcea kdcea ckdea kcdea eckda cekda ekcda kecda ckeda kceda decak edcak dceak cdeak ecdak cedak deack edack daeck adeck eadck aedck dcaek cdaek dacek adcek cadek acdek ecadk ceadk eacdk aecdk caedk acedk dekac edkac dkeac kdeac ekdac kedac deakc edakc daekc adekc eadkc aedkc dkaec kdaec dakec adkec kadec akdec ekadc keadc eakdc aekdc kaedc akedc dckae cdkae dkcae kdcae ckdae kcdae dcake cdake dacke adcke cadke acdke dkace kdace dakce adkce kadce akdce ckade kcade cakde ackde kacde akcde eckad cekad ekcad kecad ckead kcead ecakd ceakd eackd aeckd caekd acekd ekacd keacd eakcd aekcd kaecd akecd ckaed kcaed caked acked kaced akced
Note: these 'words' (valid or invalid) are all the permutations of the word decka. These words are obtained by scrambling the letters in decka.