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:
4, 9, ['6451', '9261', 's', '5587', 'D', '7595', 'D', 'E', 's', '8841', 'Y']
answer:
sED5957D7855


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


question:
6, 16, ['965', 'd', '7039', '5569', '4053', 'y', 'f', '9207', '2383', '5943', '8587', '5735', 't', 'K', '5857', '7697', '7739', 'E', '8953', 'Z', '8639', '3639', '5501', '2229', 't', '441', '2525', 'X', 'U']
answer:

79677585Kt53757858349538327029fy