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, ['B', '5601', 'v', '7431', 'z']
answer:
1347v1065


question:
8, 9, ['2123', 'O', '2505', 'd', '5435', '2145', '8281', 'b', 'v', '6485', '2349', '8739', '8459', 'O', 'h', '8279', 'L', '8345', 't', 'T', '5075', '7295', 'X']
answer:
vb


question:
15, 26, ['6275', 'X', 'K', '9585', 'c', 'c', '1693', '3643', 'A', 'd', '7501', '5041', 'k', 's', '5115', 'a', 'o', '4375', 'j', '1311', '5355', 'a', 'l', '6637', 'v', '7399', '7985', '6713', 'K']
answer:

9937v7366la55351131j5734oa5115