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: 1, 6, ['6779', '3519', 'M', 'R', 'X', '4527', '9713', 'e', '243', '2201', 'u', '3109', 'B', '6385', '7715', '1807', '6987']

67793519MRX4527