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:
1, 15, ['5997', '2005', '8529', 'j', 'T', '9729', 'T', 'm', '357', '779', '2253', '725', 'z', '4149', '2913', '8135', 'Q', 'B']
answer:
31929414z5273522977753mT9279Tj925850027995


question:
4, 19, ['I', 'h', 'D', 'd', 'e', 'X', 'h', '2821', 'y', '2537', '2345', 't', 'I', 'i', 'D', '543', '2469', 'j', 'V', 'U', '8523', '605', 'J', '6675', '8559', 'n']
answer:
Vj9642345DiIt54327352y1282hXed


question:
11, 13, ['c', '5551', 'v', '5187', 'G', 'g', 'h', 'n', '9023', 'q', '2707', '5479', 'L', 'J', 'i', 'B', '4285', '7733', '5555', '2815', '9457', 'i', '3615', '267', '303', 'F']
answer:

L97457072