Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant 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.
Input: 8, 17, ['2971', 'M', '6369', 'c', '6201', 'U', '7515', 's', 'A', '8589', '5767', '6731', '4699', '8081', '2025', '3985', '145', '721', 'a', 'k']

sA8589576767314699808120253985145