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: 4, 18, ['8151', '5681', 'l', 'q', 'H', 'M', 'j', 'h', 'G', 'R', '261', '7811', 'v', '3109', '543', 't', 'y', '6303', 'x', 'H', '1687', '5715', 'W', 'D', 'j', '3431', 'V']

6303yt5433109v7811261RGhjMHq