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.
8, 21, ['9033', '8291', '9515', 'P', '9493', 'U', '9807', 'H', 'W', '7081', '7591', 'S', '491', 'N', '9001', 'B', 'Q', '9969', 'K', 'z', '7459', 'a', 'F']