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:
9, 16, ['E', 'M', '361', '4657', '8215', '8495', '73', 'O', '1949', '8617', '7963', 'B', '4393', 'b', '5085', '1535', 'A', 't', '4831', 'v', '9665', 'Z', '7017', '4449', 'Z', 'd', 'Q', '3879', 'J', 'y']
answer:
53515805b3934B369771689491


question:
2, 2, ['799', '3533', '7841']
answer:
3353


question:
7, 8, ['8275', 'o', 'f', '6403', '7399', 'M', 'E', '7879', 'e', 'L', 'F', '2019']
answer:

9787E