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: 4, 9, ['J', '1371', 'y', 'n', 'S', '4625', '2549', '5091', 'K', '3185', '3003', 'G', '733', 'i', '2289', '3869', '219', 'n', 'i', 'D', 'Q', '4635']

K509125494625Sn