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: 5, 12, ['B', 'L', '7603', 'a', '7729', 'k', '3725', 'r', 'v', 'v', 'Q', '823', '2557', 'C', '5301', 'h', '3227', 'O', 'd', '6677', 'B', '4921', 'h', '4495', 'l', '8279', 'p']

7729k3725rvvQ823