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: 6, 14, ['4135', 'L', '549', '6097', 's', 'J', '5909', 'I', '7455', 'W', '9521', '5039', '915', 'u', '7543', '3113', '5879', 'F', '2201', 'a', 'U', '1399', 'l', '4669', 'Y', '3471', '3751']

J5909I7455W95215039915u