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:
10, 10, ['7719', 'K', '7323', '7843', '7079', 'y', '6777', 'M', 'S', 'v', 's', '4857', 'J', '8269', 'm']
answer:
v


question:
5, 8, ['g', 'a', '2875', '9581', '3263', '3103', 'J', 'b', 'h']
answer:
bJ30133623


question:
4, 9, ['4977', 'r', '7713', '5113', 'b', 'N', 'I', '2665', '2799', '7171', '8785', '6699', '9995', 'n', 'F', 'x', 'd', '9509', 'e', 'O', 'q', '9901', 'r', 'n', 'T', '7711', 'N', '7427']
answer:

99725662INb3115