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, ['u', 'D', '6391']
Example Output: 6391Du

Example Input: 7, 8, ['l', 'D', '9033', '4155', '9215', '4615', '5411', 'x', '6533', 'z', 'p', 'm', '6559', '6803', 'p', 'm', '4681', 'b', '6531', 's', '8711', '1385', 'A', 'U', 'b']
Example Output: x5411

Example Input: 2, 19, ['t', 's', 'Z', '6665', '1401', 'z', 't', 'i', '1815', '3619', 'P', '6275', 'U', '8513', '1985', '9389', 'E', 'B', '3021', '7693']
Example Output:
3021BE938919858513U6275P36191815itz14016665Zs