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.

Q: 2, 12, ['f', '1687', '819', 'N', 'w', '6089', '6725', 'p', '8625', '5327', 'r', '8103', 'd', '1441', 'v', 'k', '3407', '5891', 'X', '6419', 'e']

A: 3018r72355268p52769806wN9187861
****
Q: 1, 4, ['63', '5429', '5563', '2045', '875', '7163', '1869']

A: 54023655924536
****
Q: 2, 9, ['n', '401', '6659', 'U', 'Z', 'S', 'F', 'f', '8345', '4543', '5301']

A:
5438fFSZU9566104
****