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: 9, 9, ['8361', '6515', '7331', '6773', '3861', '4301', '9349', '5701', 'r', 'W', '389', 'J', '8213', '6439', '5451', '3855', '971', 'P', 'X', 'L']

r