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:
17, 18, ['1795', '6295', '9741', '1375', '8077', 'y', '6465', 'q', '889', 'E', 'N', 'S', '6665', 'H', '2343', 'J', '3369', '5475', 'e', '9991', 'B', 'E', '2317', 'a', 'T', '7337', 'G', '2469', 'D']
answer:
57459633


question:
1, 2, ['y', 'n', 'a', '4367', 'Q', 'S']
answer:
ny


question:
2, 16, ['6185', 'a', '6677', '115', 'r', '8527', '1769', 'O', '133', '3597', '2491', 'b', 'C', '1917', '3843', 't', '5383', 'u', 'P', '2167', '2141', '2075', 'y', '7763']
answer:

t34837191Cb19427953331O96717258r5117766a