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.

Example Input: 3, 3, ['U', '8399', '645', '3165']
Example Output: 645

Example Input: 2, 5, ['365', '3543', '3853', 'o', 'X', 'A', 't', 'n', 'D', '4773', 'D', '4257', '6539', '7915']
Example Output: Xo38533543

Example Input: 2, 4, ['v', '807', 'C', 'n', '7213', 'l', '5943']
Example Output:
nC807

