niche inche ncihe cnihe icnhe cinhe nihce inhce nhice hnice ihnce hince nchie cnhie nhcie hncie chnie hcnie ichne cihne ihcne hicne chine hcine niceh inceh ncieh cnieh icneh cineh niech inech neich enich iench einch nceih cneih necih encih cenih ecnih icenh cienh iecnh eicnh ceinh ecinh nihec inhec nhiec hniec ihnec hinec niehc inehc neihc enihc ienhc einhc nheic hneic nehic enhic henic ehnic ihenc hienc iehnc eihnc heinc ehinc nchei cnhei nhcei hncei chnei hcnei ncehi cnehi nechi enchi cenhi ecnhi nheci hneci nehci enhci henci ehnci cheni hceni cehni echni hecni ehcni ichen cihen ihcen hicen chien hcien icehn ciehn iechn eichn ceihn ecihn ihecn hiecn iehcn eihcn heicn ehicn chein hcein cehin echin hecin ehcin
Note: these 'words' (valid or invalid) are all the permutations of the word niche. These words are obtained by scrambling the letters in niche.