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: 15, 19, ['8543', '1249', 'B', '917', '1193', 'r', 't', 'G', '3205', 'I', '8097', '6337', '3295', '573', 'q', '4949', 'V', 'B', '401', 'y', '6717', 'l', '2689', 't', 'T', '8227', '9715', '8899', 's', '4449']

401BV4949q