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:
12, 12, ['c', 'a', 'G', 't', '753', 'x', 'I', '4479', 'i', 'y', 'J', 'w']
answer:
w


question:
7, 17, ['P', '9275', '2025', '6709', 'd', 'j', '745', 'F', 'd', 'T', 'w', 'E', '2915', 'g', 'E', 'r', '8951']
answer:
1598rEg5192EwTdF547


question:
2, 30, ['8881', '7241', '9565', 'w', 'g', '3723', 'v', '2259', 'g', '8481', 'd', 'Y', '5659', 'i', '137', 'D', 't', 't', 'N', '3313', '3311', 't', '9063', '1799', 'u', 'K', '5387', 'Y', 'R', '4907']
answer:

7094RY7835Ku99713609t11333133NttD731i9565Yd1848g9522v3273gw56591427