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: 13, 17, ['x', 'w', 'u', '9991', 'i', '4257', 'T', '9723', '8403', '99', 'm', 'i', 'x', '3989', 'a', '2009', 'y', 'Z']

x3989a2009y