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:
1, 2, ['y', 'n', 'a', '4367', 'Q', 'S']
answer:
ny


question:
4, 22, ['5409', 'h', 'u', 'C', 'b', '7979', 'M', '6477', 'k', 'G', '1997', '9033', '2637', 'l', 'y', '8427', '5107', '6743', '5677', '2471', '2225', 'E', 'Q']
answer:
E522217427765347670157248yl736233097991Gk7746M9797bC


question:
2, 10, ['9789', 'h', 'C', '8243', 'S', '9379', 'N', '1463', '671', 'z', 'r', 'q', '6461', '6797', '5681', 'l', '9371', '8985', 'K', '2403', 'j', 'N', 'M', '6395', '339', '4057', '3765', 'E', 'i']
answer:

z1763641N9739S3428Ch