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: 15, 21, ['4065', '5511', '8799', 'u', '6833', '7559', 'c', '2637', 'y', '7705', '109', '9933', '3025', 'E', 'l', '3711', 'd', 'W', '6289', '3755', 'X', '7631', 'i', '5027', '3723', 'b', 'f', '2193', 'B']

X37556289Wd3711l