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, 10, ['L', 'r', 'w', 't', 'T', '1931', 'q', '5649', 'Q', '7981', '6473', '1575', '6915', 'G', 'S', '9503', 'a', 'S', '4387', 'p', 'w']

Ex Output:
7981Q5649q1931Ttw


Ex Input:
1, 5, ['9965', 'a', 'P', 'F', '3811', '4375']

Ex Output:
3811FPa9965


Ex Input:
2, 18, ['507', 'X', 'A', 'o', '8305', '6763', 'W', '4941', 'v', 't', '1697', '7351', 'v', '5259', 'r', '1513', 'x', '6573', 'H', '7483', 'h']

Ex Output:

6573x1513r5259v73511697tv4941W67638305oAX