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: 2, 3, ['X', '8243', '1209']
Example Output: 90213428

Example Input: 2, 19, ['C', 'D', 'C', 'Z', '3843', 'j', 'T', 'o', '9147', '2915', 'n', 'N', '939', 'S', '2457', '7789', 's', 'z', 'V']
Example Output: Vzs98777542S939Nn51927419oTj3483ZCD

Example Input: 12, 18, ['r', 'H', 'F', 'p', '4917', 'G', 'm', 'q', 'I', 'S', 'D', 'p', '5913', '5087', '9987', 'I', '111', 'z', '2389', '1675']
Example Output:
z111I789978053195p