sands asnds snads nsads ansds nasds sadns asdns sdans dsans adsns dasns sndas nsdas sdnas dsnas ndsas dnsas andss nadss adnss danss ndass dnass sansd asnsd snasd nsasd anssd nassd sasnd assnd ssand ssand assnd sasnd snsad nssad ssnad ssnad nssad snsad anssd nassd asnsd sansd nsasd snasd sadsn asdsn sdasn dsasn adssn dassn sasdn assdn ssadn ssadn assdn sasdn sdsan dssan ssdan ssdan dssan sdsan adssn dassn asdsn sadsn dsasn sdasn sndsa nsdsa sdnsa dsnsa ndssa dnssa snsda nssda ssnda ssnda nssda snsda sdsna dssna ssdna ssdna dssna sdsna ndssa dnssa nsdsa sndsa dsnsa sdnsa andss nadss adnss danss ndass dnass ansds nasds asnds sands nsads snads adsns dasns asdns sadns dsans sdans ndsas dnsas nsdas sndas dsnas sdnas
Note: these 'words' (valid or invalid) are all the permutations of the word sands. These words are obtained by scrambling the letters in sands.