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: 15, 19, ['6887', 'D', '6827', '179', '3945', 'U', '4833', 'g', '387', '6829', '6945', '2357', 'd', 'a', 'J', '3837', 't', 'A', 'd', 'F', '207', '4475']

dAt3837J