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: 17, 19, ['5121', '3933', 'D', '4783', '277', '3945', '1903', 'P', 'w', '399', 'C', 'y', '381', '2687', '8925', 'R', '8813', 'Q', '8647', 'n', '2883', '1507', 'x', '6253']

8647Q8813