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:
2, 3, ['D', '373', '8515', 'G', 'G', 'c']

Ex Output:
8515373


Ex Input:
1, 15, ['5341', 's', 'V', 'F', '4539', '5719', '5319', '2513', 'P', 'j', 'G', '5547', 'J', '8859', 'v', '6751', '3185', '8829', 'x', '3789']

Ex Output:
v8859J5547GjP2513531957194539FVs5341


Ex Input:
5, 8, ['2497', '2561', '1485', 'u', '8201', '6697', '1553', '8765', '539']

Ex Output:

8765155366978201