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: 21, 24, ['t', '3849', '5309', '2815', 'o', 'C', '5661', '5971', '1229', 'M', '895', 'H', '5585', 'q', 'v', 'S', '5237', '4955', 'W', '9993', '4399', '7385', '1657', '3453', 'B', 'Y', 'U']

4399738516573453