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:
5, 12, ['6701', '3911', '1591', '3829', '3381', 'J', '8635', 'r', '8867', 'N', '2397', '1677', 'c', '9799']
answer:
77617932N7688r5368J1833


question:
1, 3, ['7635', 'c', 'h', 'D', 'K', '7235', 'e']
answer:
hc5367


question:
2, 6, ['7641', '7733', '3437', 'g', 'q', '5635', 'd', 'x', '7033']
answer:

5365qg73433377