In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

Example Input: 3, 4, ['6865', 'A', 's', 'o', '1989', 'i', '613', 'S', 's']
Example Output: os

Example Input: 2, 5, ['1987', '3507', '839', '3509', '9857', 'V', '9987', 'g', 'G', '7295', 'v', 'b', 'o', 'Q', 'Q', 'x', '3295', '9917', 'R', '221']
Example Output: 758990539387053

Example Input: 4, 6, ['Y', 'x', '5547', '8309', 'w', '461', '1927', 't', '8373', '9835', '3703', 'U', 'D']
Example Output:
164w9038