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:
10, 13, ['D', 'A', '4221', '7301', '1937', 'r', '5105', 'q', 'F', 'j', '9441', '6391', '7081', 'l', '6569', 'i', '8871', '5985']
answer:
180719361449j


question:
5, 5, ['r', 'n', 'J', 'U', '3587', 'J', 'A', '9729', '2919', '1417', '2605', '2663', '9427', '4449', '8545', '8673', '3417', '5671', 'e', 'W', '6963', '6713', 'c', '5071', '2823']
answer:
7853


question:
14, 14, ['1043', '63', '6789', '2035', '6911', 'u', '5187', '3543', 's', '7643', 'H', 'L', '7671', 'I', '9705', '9449', 's', '8379', '2321', '3081', 'I', '4693', 'W', '5503', '7175']
answer:

I