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, 5, ['S', 'c', 'y', '6121', 'r', '3279', '6425']
Example Output: r6121y

Example Input: 1, 4, ['a', '9257', 'K', '3909', '1655']
Example Output: 3909K9257a

Example Input: 3, 5, ['1903', '9081', '8805', 'U', 'M', 'b', '3781', '8187', 't', 's', '2987', '9509', '9529']
Example Output:
MU8805