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: 5, 13, ['b', '3531', 'W', '9517', '8489', 'V', 't', '2971', '7933', 'e', 'c', 'n', 'u']

8489Vt29717933ecnu