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.
11, 21, ['M', 'm', '4625', '3373', '9539', '8379', 'L', 'H', '2067', 'h', 'C', '6209', '3269', 'x', '9371', '5833', 'm', 't', 'o', '7557', '7591', 'm', '8683', '1903', '5815', 'l', 't']