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: 2, 18, ['v', '3689', 'y', 'L', '8471', '2227', '4877', 'n', 'r', '2753', '9683', '7979', '9925', '4545', 'b', 'S', 't', '3503', 'M', '3541', 'e', '5941', 'a', 'D', 'v', 'M', 'X', '7023']

3503tSb45459925797996832753rn487722278471Ly3689