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: 6, 9, ['4871', '9721', 'H', '8373', 'z', 'u', '1007', 'K', '4309', 'w', 'J', 'y', '433', 'N', '4177', 'D', 'H', 'C', '2321', 'j', 'b', 'W', 'j', '2493']

4309K1007u