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.
19, 19, ['7475', '5517', '3651', 'w', 'i', '4985', 'x', 'X', '9525', '3873', 'f', '1715', '7551', 'L', '5047', 'e', '2543', 'R', 'h', 'l', '5715', '4425', '8277', '8725', 'k']