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.
4, 7, ['w', 'x', 'f', '4897', 'c', '7307', 'H', 'v', '2265', 'r', '7005', '3659', '5979', 'w', '6603', 'a', 'y', '6645', '5359', '1807', 'i', 'Q', 'W', 'B', 'F', '1769', 'E', 'U', '969']