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:
7, 7, ['L', 'N', 'k', '4239', '9509', 'B', '875', '8169', '5417', 'N']

Ex Output:
875


Ex Input:
4, 5, ['5611', '2101', '3829', 'H', 's', '6545', 'X', 'T', 'q', 'p', 'O', 'C', 'U']

Ex Output:
sH


Ex Input:
3, 4, ['3923', 'G', '7589', 'l', 'c', '681', 'N', 'V', '585', 'w', '539', 'I']

Ex Output:

l7589