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