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, ['U', 'U', '5201', '4581', '2943', 'B', 'j']
Example Output: 1025U

Example Input: 2, 11, ['N', '5989', '9485', '1955', '4841', '8403', 'f', 'M', '3261', '9581', '8083', '5201', '6391', 'h', 'C', 'O', '6361', '4033', '9121', '9825']
Example Output: 380818591623Mf30481484559158499895

Example Input: 3, 23, ['t', 's', '5641', 'J', 'Q', 'G', 'O', '273', '805', 'm', 'M', '1381', '9225', 'u', '6251', '2807', '4031', '1693', '7025', 'O', '7909', 'i', '9425', 'j', 'q', 'v', '3593', 'y', 'z']
Example Output:
5249i9097O52073961130470821526u52291831Mm508372OGQJ1465