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:
4, 6, ['5237', 'U', '7073', 'K', 'R', 'g', 'D', '17', 'I', '3039']

Ex Output:
gRK


Ex Input:
2, 16, ['6201', 'h', 'C', 'x', 'x', '6963', '7971', 'p', 'O', 'U', '9701', 'J', '4019', '1277', '7223', 'V', '3221', 'q', '1101']

Ex Output:
V722312774019J9701UOp79716963xxCh


Ex Input:
3, 18, ['6757', 'B', 'l', 'p', '8267', 'Z', 'J', '8349', '5225', 'y', 'a', 'B', 'W', 'P', 'l', 'm', '3945', 'B', '1435', 'u', '4599', 'C', 'N', 'v', 'd', 'l', 'U']

Ex Output:

B3945mlPWBay52258349JZ8267pl