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.
23, 23, ['Q', '7615', '5427', '3331', '7767', '6545', 'u', '5391', 'p', '6191', '4445', '2817', 'Q', 'F', 'I', '4577', 'Y', '8067', '547', 'I', 'K', '5015', 'j', '8371', '3015', 'L']