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, 15, ['4203', 'w', '2121', 'a', 'K', 'W', '8339', 'i', '7993', 'B', '2891', 'd', '6599', '5411', '5195', '557', '9673', '6807', '3067', 'v', '1353', '1281']

519554116599d2891B7993i8339WKa