instruction:
In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.
question:
5, 9, ['7453', '7415', 's', 'O', '1161', 'G', 'N', '5925', '3367', 'f', '7739', 'b', 'y', 'o', '2431', 'Y']
answer:
76335295NG1611


question:
5, 6, ['A', 'v', 'x', '2047', '5955', 'l', '4845', '1347', 'i', 'm', 'W', 'h', 'w', '4483', '1509']
answer:
l5595


question:
3, 21, ['D', '6725', 'd', '2875', 'J', 'L', '801', 'j', 'y', '8777', '7169', '7403', '2593', 'x', 'n', '5971', 'E', '771', '2323', 'b', '1595', '8211', 'i', '6709', 'E', 'v', '6551']
answer:

5951b3232177E1795nx3952304796177778yj108LJ5782d