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: 6, 8, ['u', 'y', '5599', 'i', 'Z', 'F', '8907', 'A', 'l', '8821', 'B', 'G', 'd']

Output: A7098F


Input: Consider Input: 15, 23, ['v', '5691', 'D', 'H', '2919', 'Z', 's', 'H', 'v', 'l', 'a', 'H', 'U', 'w', '8731', '8953', 'a', '5051', '2185', '4509', '8899', '1863', '5589']


Output: 985536819988905458121505a35981378