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: 7, 18, ['2347', 'y', 'i', 'G', 'p', '821', 'l', 'K', '2571', '3897', 'I', 'X', 'o', 'w', 'F', 'h', 'o', 'k']
Example Output: kohFwoXI38972571Kl

Example Input: 1, 2, ['z', '1877']
Example Output: 1877z

Example Input: 7, 9, ['X', 'a', 'x', '2835', '8421', 'y', 'U', 's', '4091', 'N', 'y']
Example Output:
4091sU