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: 4, 17, ['x', 'W', '779', '2407', '3985', '7501', 'f', '337', '1509', 'P', 'B', '2945', 'J', '6517', '3723', 'H', 'v', '5363', '9681']

240739857501f3371509PB2945J65173723Hv