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: 18, 24, ['R', 'q', '1539', '4609', 'U', 'U', 'T', '6855', '6383', '3117', 'o', '9519', 'h', '6999', 'B', 'm', 'E', '2325', '8739', 'u', '8507', 'F', 'g', '8765']

8765gF8507u87392325