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, 16, ['J', 'x', '7741', 'L', '4145', '2393', '9993', 'j', 'r', '1863', '9579', 'r', 'k', '7077', 'W', '8405', '439', '7967', 'G', 'Q', 'Y', '7433']

8405W