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: 1, 10, ['K', '8357', 'C', 'M', 'S', 'n', 'U', '6663', 'J', '523', 'U', 'o', '7127', '3723', '7049', '5207', '9869', 'h', 'G', 'U', '1517', 'W', 'M', 'e', 'F', '7403', '5755', 'G']

K8357CMSnU6663J523