nests ensts nsets snets esnts sents netss entss ntess tness etnss tenss nstes sntes ntses tnses stnes tsnes estns setns etsns tesns stens tsens nesst ensst nsest snest esnst senst nesst ensst nsest snest esnst senst nsset snset nsset snset ssnet ssnet essnt sesnt essnt sesnt ssent ssent netss entss ntess tness etnss tenss nests ensts nsets snets esnts sents ntses tnses nstes sntes tsnes stnes etsns tesns estns setns tsens stens nstse sntse ntsse tnsse stnse tsnse nsste snste nsste snste ssnte ssnte ntsse tnsse nstse sntse tsnse stnse stsne tssne sstne sstne tssne stsne estsn setsn etssn tessn stesn tsesn esstn sestn esstn sestn ssetn ssetn etssn tessn estsn setsn tsesn stesn stsen tssen ssten ssten tssen stsen
Note: these 'words' (valid or invalid) are all the permutations of the word nests. These words are obtained by scrambling the letters in nests.