false aflse flase lfase alfse lafse fasle afsle fsale sfale asfle safle flsae lfsae fslae sflae lsfae slfae alsfe lasfe aslfe salfe lsafe slafe fales afles flaes lfaes alfes lafes faels afels feals efals aefls eafls fleas lfeas felas eflas lefas elfas alefs laefs aelfs ealfs leafs elafs fasel afsel fsael sfael asfel safel faesl afesl feasl efasl aefsl eafsl fseal sfeal fesal efsal sefal esfal asefl saefl aesfl easfl seafl esafl flsea lfsea fslea sflea lsfea slfea flesa lfesa felsa eflsa lefsa elfsa fsela sfela fesla efsla sefla esfla lsefa slefa lesfa elsfa selfa eslfa alsef lasef aslef salef lsaef slaef alesf laesf aelsf ealsf leasf elasf aself saelf aeslf easlf sealf esalf lseaf sleaf lesaf elsaf selaf eslaf
Note: these 'words' (valid or invalid) are all the permutations of the word false. These words are obtained by scrambling the letters in false.