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:
3, 6, ['z', 'b', '2697', 'W', '1449', 'x', '5327']
answer:
x9441W7962


question:
4, 7, ['c', '481', '7079', '1095', 'k', 'q', '2751', 'c', 'W', 'E', '8159', 'p', '4517', 'z', 'w']
answer:

1572qk5901