terra etrra trera rtera ertra retra terra etrra trera rtera ertra retra trrea rtrea trrea rtrea rrtea rrtea errta rerta errta rerta rreta rreta terar etrar trear rtear ertar retar tearr etarr taerr aterr eatrr aetrr traer rtaer tarer atrer rater arter eratr reatr eartr aertr raetr aretr terar etrar trear rtear ertar retar tearr etarr taerr aterr eatrr aetrr traer rtaer tarer atrer rater arter eratr reatr eartr aertr raetr aretr trrae rtrae trrae rtrae rrtae rrtae trare rtare tarre atrre ratre artre trare rtare tarre atrre ratre artre rrate rrate rarte arrte rarte arrte errat rerat errat rerat rreat rreat erart reart earrt aerrt raert arert erart reart earrt aerrt raert arert rraet rraet raret arret raret arret
Note: these 'words' (valid or invalid) are all the permutations of the word terra. These words are obtained by scrambling the letters in terra.