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: 1, 3, ['Y', 'k', 'P', '1517', 'z', '8727', 'U']
Example Output: PkY

Example Input: 5, 17, ['F', 'a', '241', '6537', 'X', 'e', 's', '7371', 'g', 'i', 'Y', 'q', '8647', '9981', '665', 'B', 'B', 'I', '5655', 'y']
Example Output: BB66599818647qYig7371seX

Example Input: 14, 20, ['F', 'L', '7689', 'N', 'D', '9869', '9651', 'o', 'e', 'J', 'n', '8909', '671', 'v', '7017', '1181', 'U', '9849', '1707', 'd', '3943', '2107', 'a']
Example Output:
d17079849U11817017v