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, 11, ['8995', 'B', '6843', '6891', '4637', 'k', 'y', '8891', '9437', 'R', 'q', '225', 'i', 'f', 'l', 'R', '2861', '931', 'S', 'U', 'E']

qR94378891yk463768916843B