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: 7, 15, ['971', 'E', '5771', 'Q', '1579', 'a', '3681', 'e', 'I', '9689', 'b', '1785', 'H', '7807', '593']

3681eI9689b1785H7807593