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: 13, 21, ['L', '1455', 'V', 'J', '4121', '1321', '4983', 'W', '8097', 'X', 'T', 'k', '3987', '5787', '4061', '3105', '9087', '5027', '9409', '8879', 'o', '1369', 'm', 'D', 'R', 'n']

o88799409502790873105406157873987