ocasd coasd oacsd aocsd caosd acosd ocsad cosad oscad socad csoad scoad oascd aoscd osacd soacd asocd saocd casod acsod csaod scaod ascod sacod ocads coads oacds aocds caods acods ocdas codas odcas docas cdoas dcoas oadcs aodcs odacs doacs adocs daocs cados acdos cdaos dcaos adcos dacos ocsda cosda oscda socda csoda scoda ocdsa codsa odcsa docsa cdosa dcosa osdca sodca odsca dosca sdoca dsoca csdoa scdoa cdsoa dcsoa sdcoa dscoa oasdc aosdc osadc soadc asodc saodc oadsc aodsc odasc doasc adosc daosc osdac sodac odsac dosac sdoac dsoac asdoc sadoc adsoc dasoc sdaoc dsaoc casdo acsdo csado scado ascdo sacdo cadso acdso cdaso dcaso adcso dacso csdao scdao cdsao dcsao sdcao dscao asdco sadco adsco dasco sdaco dsaco
Note: these 'words' (valid or invalid) are all the permutations of the word ocasd. These words are obtained by scrambling the letters in ocasd.