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.

Input: Consider Input: 2, 5, ['1987', '3507', '839', '3509', '9857', 'V', '9987', 'g', 'G', '7295', 'v', 'b', 'o', 'Q', 'Q', 'x', '3295', '9917', 'R', '221']

Output: 758990539387053


Input: Consider Input: 2, 6, ['6717', '6639', 'l', 'i', 'o', '1819']

Output: 9181oil9366


Input: Consider Input: 4, 13, ['6807', 'B', 'k', 'A', 'H', '5315', 'L', '7651', 'S', 'E', '8819', '1569', '1657', 'd', 'v']


Output: 756196519188ES1567L5135HA