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, 22, ['D', 'G', 'a', '6827', 'I', 'P', 'D', 'n', '949', '7489', '9837', '5711', '3439', 'U', 'l', 'U', '985', '4407', '6251', '8329', '3491', '3877', '6681']

34913877