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: 6, 16, ['r', '4837', '4661', 'Y', 'O', '8231', 'W', 'R', '265', 's', '79', 'I', 'v', '4681', 'U', '6819', 'Y', 'E']

8231WR265s79Iv4681U6819