intra nitra itnra tinra ntira tnira inrta nirta irnta rinta nrita rnita itrna tirna irtna ritna trina rtina ntria tnria nrtia rntia trnia rtnia intar nitar itnar tinar ntiar tniar inatr niatr iantr aintr naitr anitr itanr tianr iatnr aitnr tainr atinr ntair tnair natir antir tanir atnir inrat nirat irnat rinat nriat rniat inart niart ianrt ainrt nairt anirt irant riant iarnt airnt raint arint nrait rnait narit anrit ranit arnit itran tiran irtan ritan trian rtian itarn tiarn iatrn aitrn tairn atirn iratn riatn iartn airtn raitn aritn train rtain tarin atrin ratin artin ntrai tnrai nrtai rntai trnai rtnai ntari tnari natri antri tanri atnri nrati rnati narti anrti ranti arnti trani rtani tarni atrni ratni artni
Note: these 'words' (valid or invalid) are all the permutations of the word intra. These words are obtained by scrambling the letters in intra.