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:
1, 1, ['9083', '2705']

Ex Output:
9083


Ex Input:
2, 12, ['w', '5107', '5237', 'N', 'u', '3411', 'G', 'S', 'N', 'e', '5437', 'U', 'k', 'i', '1547']

Ex Output:

U5437eNSG3411uN52375107