dirks idrks driks rdiks irdks ridks dikrs idkrs dkirs kdirs ikdrs kidrs drkis rdkis dkris kdris rkdis krdis irkds rikds ikrds kirds rkids krids dirsk idrsk drisk rdisk irdsk ridsk disrk idsrk dsirk sdirk isdrk sidrk drsik rdsik dsrik sdrik rsdik srdik irsdk risdk isrdk sirdk rsidk sridk diksr idksr dkisr kdisr ikdsr kidsr diskr idskr dsikr sdikr isdkr sidkr dksir kdsir dskir sdkir ksdir skdir iksdr kisdr iskdr sikdr ksidr skidr drksi rdksi dkrsi kdrsi rkdsi krdsi drski rdski dsrki sdrki rsdki srdki dksri kdsri dskri sdkri ksdri skdri rksdi krsdi rskdi srkdi ksrdi skrdi irksd riksd ikrsd kirsd rkisd krisd irskd riskd isrkd sirkd rsikd srikd iksrd kisrd iskrd sikrd ksird skird rksid krsid rskid srkid ksrid skrid
Note: these 'words' (valid or invalid) are all the permutations of the word dirks. These words are obtained by scrambling the letters in dirks.