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: 9, 20, ['q', 'x', 'p', 'Z', '577', 'H', 'J', '3563', 'U', '9523', 'k', 'i', 'P', '5015', '7335', '145', 'r', 'p', '5633', 'r', '9433', 'P', 'r', '5295', 'Z', 'U']

r5633pr14573355015Pik9523U