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: 8, 18, ['y', 'u', '8297', '6517', 'o', '809', '1919', 'Y', 'Z', 'S', '7577', 'W', '9311', '1613', 'p', 'Y', 'y', 'N', '9665', 'l', '7987']

YZS7577W93111613pYyN