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: 6, 19, ['1247', 'w', '6657', '3757', '9313', 'u', '5655', 'n', '9559', '4017', '9041', 'n', 'w', '155', 'C', 'N', '6351', '9761', '5701', '3857', '6167', 'u']
Example Output: 107516791536NC551wn140971049559n5565u

Example Input: 6, 7, ['2289', '1015', 'T', 'e', '4499', 'J', 'B', '5107', 'x', '3103', 'Q', 'Z', 'H']
Example Output: BJ

Example Input: 11, 18, ['9655', '1321', 'F', '9247', 'D', 'M', '1315', '8081', '5141', 'E', 'h', '8665', 'r', '5347', '1', 'I', 'd', '2819', 'i', 'h', '4331', '1955', '5861', 's']
Example Output:
9182dI17435r5668h