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: 2, 16, ['o', 'r', 'j', 'Y', 'W', '4487', 'x', '8209', '2199', 'X', '609', '2521', '3017', 'H', '939', '7131', 'Z', 'W', 'T', '8131', '9689', '1423', 'P', 'c', 'h', 'y', '7091', 'r', 'U']

7131939H30172521609X21998209x4487WYjr