Definition: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
Input: 20, 25, ['H', 's', 'X', 'Q', '5009', 'Q', '2911', 'T', 'f', 'k', 'c', 'e', '3831', 'j', '9175', '2885', 'k', '3935', '4853', 'U', 'K', 'r', '5105', '3857', '9941', '719', 'C', '9881', '1833']

994138575105rKU