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:
8, 13, ['7725', '8399', 'P', '9663', '4059', '5265', '1703', 'I', 'E', '1587', 'X', 'N', 'W', 'K', 'j', 'R', 'P']
answer:
WNX7851EI


question:
1, 2, ['e', 'F']
answer:
Fe


question:
8, 12, ['7933', 'b', 'K', '7237', 'V', 'r', '9747', '3953', 'E', '3887', '8421', 'y', 'h']
answer:

y12487883E3593