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: 12, 20, ['2631', 'q', '3949', 'T', '405', 'S', 'K', 'L', 'y', 'D', 'X', 'P', '4129', '6887', 'Y', 'H', '6989', 'n', '5857', '4211', '6139', '8579', 'Q', 'k', '8551']

P41296887YH6989n58574211