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: 17, 21, ['d', '8123', 'u', '6045', '6167', 'b', '4021', 'z', 'g', '5937', '7649', 'M', 'v', '3099', 'W', 'J', 'T', '1535', 'W', '7625', '409']

T1535W7625409