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:
6, 7, ['J', '701', 'm', '8837', 'b', 'd', '5911', 'y', '8031']
answer:
1195d


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


question:
16, 23, ['9111', '1407', '3391', '5729', '2335', '235', 'F', '193', '4169', '8343', 'D', '5885', '4987', 'U', '4581', '5125', 'A', 'Y', 'B', '2439', 'n', '587', '7073', 'f', '4979', '9867', '1555', '477']
answer:

3707785n9342BYA5215