instruction:
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.
question:
4, 7, ['n', 'X', '7943', '49', 'm', '4459', 'O', 'a', '4759', '1551', 'c', '6053', '6213', '6997', '7613', '669', 'e']
answer:
O4459m49


question:
15, 16, ['243', '3195', '1763', '1283', '1463', '2655', '7', 'S', 's', '3155', 's', 'D', '7659', 'Q', 'm', '3821', '593', 'D', '5447']
answer:
3821m


question:
3, 3, ['2165', '1351', '8867', '2393', '3661', '7387', 't', '6983', 'C', '1569', 'M', '1827', '6051', '809']
answer:

8867