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: 20, 23, ['6657', 'd', '5969', 'B', '997', '147', 'g', 'R', 'U', '2409', '4989', 'M', '8675', 'J', '2039', '3867', 'w', 'z', 'm', '2835', 'r', '7813', 'K', 'l', 'o', '615', '9983', '9719', 'Z']

2835r7813K