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, 8, ['9889', 'z', '895', 'W', 'j', 'K', '7047', '9723', '6281']
answer:
32797407Kj


question:
6, 6, ['9431', '6731', 'A', '5153', 'K', '1567', 'D', 'Y', 'a', 'q', 'x']
answer:
7651


question:
23, 25, ['367', 'd', '5937', 'h', '9939', 'x', '2411', '127', '5523', 'W', 'N', '7795', '3135', '2225', 'v', '7433', '4185', 'u', 'B', 'B', 'I', 'x', '1781', 'x', 'c', 'Q', 'n']
answer:

cx1871