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:
1, 2, ['A', '8103', '7829']
answer:
3018A


question:
5, 6, ['J', '6957', 's', 'l', 'C', 'o', 'H', 'u', 'g', 'P', 'N', 'v', 'S', '6145', 'o', 'z', 'B', 'o', 'E', 'f', '817', 'I', 'k', 'I', '7331', 'x']
answer:
oC


question:
5, 14, ['i', '9163', '5', 'J', '9027', '6209', '8217', 'E', '5801', '9567', '4425', '2857', 'y', 'j', 'A', 'C', '8197', 'M', 'l', 'K', 'x', '879', 'Z', 'X', '5241', 'o', 'N', '3891', 'W']
answer:

jy7582524476591085E712890267209