Definition: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant string. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.
Input: 8, 21, ['x', 'i', 'Q', 'A', '2207', '8347', '6745', '4315', '85', 'z', 'c', 'z', '535', 'X', '7267', '1461', '543', 'h', '5235', '1659', '7921', '2349', 'E', 'A']

792116595235h54314617267X535zcz854315