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