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, 4, ['v', '807', 'C', 'n', '7213', 'l', '5943']

Ex Output:
nC807


Ex Input:
1, 3, ['121', 'D', 'T', 'D', 'e']

Ex Output:
TD121


Ex Input:
3, 7, ['C', 'd', '1299', 'B', 'P', '3477', 'w', 'n', '7615', 's', 'W', 'n', 'T', '373', '9833', 'y', '6547', 'Y', 'F', 'Y', '6253']

Ex Output:

w3477PB1299