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: 5, 6, ['q', 'L', 'f', '391', '7601', '2925', 'i', 'C', '4787']
Example Output: 52921067

Example Input: 2, 4, ['U', '4013', '3925', '9017', '3425', 'H', '9015', '4053', '8915', '5945', '8979', '2203']
Example Output: 710952933104

Example Input: 3, 4, ['c', 'A', 'L', '9045', '721', '1757', '4419', 't', '465', 'T', 'V', '1773', '5943', 'p', 'Q', '8331', 't', '9769', '9059']
Example Output:
5409L