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: 2, 21, ['8607', '4525', 'k', 'W', 'T', 'T', '8563', 'e', '9641', 'w', '5423', 'i', 'I', 'F', '3221', 'o', 'z', 'B', '3909', 'm', '8119']

8119m3909Bzo3221FIi5423w9641e8563TTWk4525