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, ['O', '5581', 'r', 'H', 'f', 'y', 'A', 'g', '6023', 'G', 'G', 'm', '8767']
answer:
7678mGG3206g


question:
5, 7, ['Y', '5101', 'B', '5129', 'a', 'y', 'v', '4577', '5455', '6685', '6435']
answer:
vya


question:
3, 17, ['p', '6997', '6585', '4321', 'Y', 'k', 'x', '2355', 'r', '8405', 'A', '2377', 'c', 'q', '2529', 'M', 'W', 'B', 'W', 'K']
answer:

WM9252qc7732A5048r5532xkY12345856