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, 18, ['R', 'G', 'v', 'K', '9345', 'i', '8939', 'm', 'x', '7769', '5665', '793', '9293', '1059', 'W', '6841', '1569', 'A']

A15696841W1059929379356657769x