snift nsift sinft isnft nisft insft snfit nsfit sfnit fsnit nfsit fnsit sifnt isfnt sfint fsint ifsnt fisnt nifst infst nfist fnist ifnst finst snitf nsitf sintf isntf nistf instf sntif nstif stnif tsnif ntsif tnsif sitnf istnf stinf tsinf itsnf tisnf nitsf intsf ntisf tnisf itnsf tinsf snfti nsfti sfnti fsnti nfsti fnsti sntfi nstfi stnfi tsnfi ntsfi tnsfi sftni fstni stfni tsfni ftsni tfsni nftsi fntsi ntfsi tnfsi ftnsi tfnsi siftn isftn sfitn fsitn ifstn fistn sitfn istfn stifn tsifn itsfn tisfn sftin fstin stfin tsfin ftsin tfsin iftsn fitsn itfsn tifsn ftisn tfisn nifts infts nfits fnits ifnts fints nitfs intfs ntifs tnifs itnfs tinfs nftis fntis ntfis tnfis ftnis tfnis iftns fitns itfns tifns ftins tfins
Note: these 'words' (valid or invalid) are all the permutations of the word snift. These words are obtained by scrambling the letters in snift.