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, ['j', '239', '9689', 's', 'C', 'w']
Example Output: Cs9869

Example Input: 1, 3, ['8015', 'y', 'r', '8077', 'U']
Example Output: ry5108

Example Input: 1, 2, ['4211', '3035', '3071', '3941', 'D', '1851']
Example Output:
53031124