Write SQL query to solve given problem: Please list the full names of the customers who have purchased at least one root beer produced by AJ Stephans Beverages.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.First, T1.Last FROM customers AS T1 INNER JOIN `transaction` AS T2 ON T1.CustomerID = T2.CustomerID INNER JOIN rootbeer AS T3 ON T2.RootBeerID = T3.RootBeerID INNER JOIN rootbeerbrand AS T4 ON T3.BrandID = T4.BrandID WHERE T4.BreweryName = 'AJ Stephans Beverages'