Definition: 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.
Input: 19, 20, ['8101', '9073', '3039', 'R', '5241', '8669', '2589', '2841', '2595', 'Y', '5465', 'N', 'u', 'X', 'U', 'Y', '4411', '9217', 'O', '6865', 'q', '2625', '5297', 's']

6865O