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: 12, 15, ['x', '8797', '7331', '4215', '4995', '9235', 'T', 'n', 'O', '6329', '635', '6127', '89', 'A', '4065', '5549', '4189', '7769', 'O', '2863', '6963', 'W', 'd', 'C', 'y', '6329', 'W', '3057', 'u']

612789A4065