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: 2, 4, ['b', '673', '9867', '3503', '7333', 's', 'J', 'm', '3129', '3487', '8857', '7571', '7009', '8359', 'S', '5633', 'R', '8721', 'K', '8503', 'v', '4413']

67398673503