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:
16, 23, ['8677', '5311', '9815', 'v', 'x', 'q', 'F', '5221', '7309', '5201', '6021', 'w', 'e', 'q', '7021', '8889', '4377', 'w', '2731', '5969', 'J', '1001', '637', 'r', 'b', '409', 'l', '391']
answer:
7361001J96951372w77349888


question:
7, 8, ['k', '59', 'Q', 'b', 'N', '5153', 'm', 's', '1703', 'i', 'E', 'x', '4727', '9723', '9305', '8843', '5295', '4281', '555']
answer:
sm


question:
3, 3, ['1195', '5147', 'f']
answer:

f