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, 15, ['b', 'P', '4837', 'b', 'e', 'R', '413', 'Q', '4971', '4753', 'U', 'w', '9673', 'K', '9941', 'M', 'O', 'n', 'y']

9941K9673wU47534971