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.
17, 21, ['C', '9891', 'y', 'j', '8075', 'z', '2875', 'Z', '6211', 't', '4297', '8051', '9339', '9997', 'h', '1169', 'c', '1373', 'r', '9239', 'H', 'N', 'u', '8739', 'h', '6877']