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: 8, 21, ['1663', 'D', 'v', '1615', 'B', '4297', 'v', '3113', '3365', 'N', 'X', '7903', 'E', 'Y', '3405', '1005', '4433', 'y', 'I', 'C', 'X']

XCIy443310053405YE7903XN33653113