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: 9, 21, ['5939', '9077', 'm', '1691', 'X', '3529', 'h', '4989', '6181', '7353', '3769', '7791', 'g', 'p', 's', '15', 'N', '2325', '4975', '8011', '8825', 'B', 'j', 'v', '5633', 'M', '9921', '8973', 'B']

8825801149752325N15spg7791376973536181