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: 3, 19, ['X', '6737', 'D', '8265', 'R', 'x', 'u', '3275', '3815', '9423', 'k', '7689', 'M', '9817', '5603', '9747', '9233', '6433', 'L', 'Z']

L64339233974756039817M7689k942338153275uxR8265D