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: 7, 16, ['6899', 's', 'h', 'l', '573', 'm', '661', '9529', '579', 'W', '6667', '5937', '7733', 'q', 'b', '9833', '7745', '1841', 'o', '7869']

6619529579W666759377733qb9833