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: 16, 21, ['3755', '3985', '787', 'w', '4833', '2515', 'q', 'k', 'p', 'x', '9291', '8207', '4159', 'Q', '8173', 'Z', '8009', '6477', 'p', 'a', '5965', '2359', '7295', '7619']

5965ap64778009Z