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.
13, 20, ['1643', '4717', '5969', '5965', '7477', 'Y', '3415', 'Q', 'U', 'N', '9481', 'o', '2575', '7025', 'n', 'P', '1123', '5753', 's', '797', 'L', '1627', 'x', 'Q', '7573', '7135', '8129', 'x']