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.
14, 15, ['r', 'Q', 'f', '2567', 'Y', 'U', '8777', 'g', '9837', '3747', '341', '3285', 'G', 'J', '6425', 'a']