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, 5, ['C', '4345', 'T', 't', 'U', 'p']
Example Output: UtT

Example Input: 8, 9, ['2123', 'O', '2505', 'd', '5435', '2145', '8281', 'b', 'v', '6485', '2349', '8739', '8459', 'O', 'h', '8279', 'L', '8345', 't', 'T', '5075', '7295', 'X']
Example Output: vb

Example Input: 13, 20, ['3625', '6647', '6449', 'H', 'f', 'g', '5761', '3311', '6505', '8367', 'T', '2871', 'n', '4249', 'H', '5903', 'S', '5573', '2739', '3677']
Example Output:
776393723755S3095H9424n