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: 3, 13, ['d', 'F', 'm', 'W', 'B', '7515', '337', 'O', 'n', '3387', 'w', '4859', 'l']

mWB7515337On3387w4859l