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:
2, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']
answer:
hp3935


question:
2, 9, ['3441', 'a', 'o', 'B', 'e', 'u', 'B', 'Z', '1287', '323', '5849', 'F', '7917', '1023', '6323', 'A', 'v', '491', '6123', '5949', '1409', 'I', '6889']
answer:
7821ZBueBoa


question:
8, 16, ['389', '9021', 'r', '1369', 'E', 'Z', '9561', '443', '2947', 'H', '1301', '2829', 'A', 'd', 'H', 'W', 'x', '7921', '8637']
answer:

WHdA92821031H7492344