retia ertia rteia treia etria teria reita erita rieta ireta eirta ierta rtiea triea ritea irtea tirea itrea etira teira eitra ietra tiera itera retai ertai rteai treai etrai terai reati erati raeti areti earti aerti rtaei traei ratei artei tarei atrei etari teari eatri aetri taeri ateri reiat eriat rieat ireat eirat ierat reait erait raeit areit earit aerit riaet iraet raiet ariet iaret airet eiart ieart eairt aeirt iaert aiert rtiae triae ritae irtae tirae itrae rtaie traie ratie artie tarie atrie riate irate raite arite iarte airte tiare itare taire atire iatre aitre etiar teiar eitar ietar tiear itear etair teair eatir aetir taeir ateir eiatr ieatr eaitr aeitr iaetr aietr tiaer itaer taier atier iater aiter
Note: these 'words' (valid or invalid) are all the permutations of the word retia. These words are obtained by scrambling the letters in retia.