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.

Ex Input:
3, 3, ['2789', '6611', '5143']

Ex Output:
5143


Ex Input:
2, 3, ['W', 'Y', '6265', 'D']

Ex Output:
6265Y


Ex Input:
5, 10, ['R', 'Z', '1569', '5877', 'N', '5363', 'K', 'H', 'C', '5725', 'U', 'v', 'y', '7857']

Ex Output:

5725CHK5363N