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.

Ex Input:
1, 2, ['y', 'n', 'a', '4367', 'Q', 'S']

Ex Output:
ny


Ex Input:
6, 13, ['a', 't', '3699', 'H', 'c', 'S', '2713', '5419', 'q', '7877', 'q', 'U', '833', '8411', '2003', '5373', 'P', '2913']

Ex Output:
338Uq7787q91453172S


Ex Input:
6, 12, ['1781', '2579', '9561', 'n', '1709', '8807', 'x', '5035', '7423', 'P', '849', '2183', '2803', '89', 'l']

Ex Output:

3812948P32475305x7088