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: 19, 21, ['o', 'P', 'e', 'H', 'q', '8887', 's', '2871', '8691', '2179', '6513', 'C', 'Q', '3277', '5633', 'v', '2779', '5657', 'F', 'F', '577', 'E']

FF577