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, 13, ['i', 'W', '277', 'w', 'c', '5595', '8765', 'K', 'U', 't', 'h', '3931', 'R', 'D']

8765KUth3931R