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:
2, 3, ['X', '8243', '1209']
answer:
90213428


question:
2, 11, ['G', 'z', 'w', 'C', 'h', '6193', 'T', 'r', 'f', 'h', 'p', 'R']
answer:
phfrT3916hCwz


question:
5, 13, ['1335', 'C', '8613', '6143', 'S', '6615', 'a', '631', 'a', 'd', '9295', '2547', '2959', '9349']
answer:

959274525929da136a5166S