bktla kbtla btkla tbkla ktbla tkbla bklta kblta blkta lbkta klbta lkbta btlka tblka bltka lbtka tlbka ltbka ktlba tklba kltba lktba tlkba ltkba bktal kbtal btkal tbkal ktbal tkbal bkatl kbatl baktl abktl kabtl akbtl btakl tbakl batkl abtkl tabkl atbkl ktabl tkabl katbl aktbl takbl atkbl bklat kblat blkat lbkat klbat lkbat bkalt kbalt baklt abklt kablt akblt blakt lbakt balkt ablkt labkt albkt klabt lkabt kalbt aklbt lakbt alkbt btlak tblak bltak lbtak tlbak ltbak btalk tbalk batlk abtlk tablk atblk blatk lbatk baltk abltk labtk albtk tlabk ltabk talbk atlbk latbk altbk ktlab tklab kltab lktab tlkab ltkab ktalb tkalb katlb aktlb taklb atklb klatb lkatb kaltb akltb laktb alktb tlakb ltakb talkb atlkb latkb altkb
Note: these 'words' (valid or invalid) are all the permutations of the word bktla. These words are obtained by scrambling the letters in bktla.