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: 9, 17, ['L', '5235', '5701', '9123', '8687', '1671', 'U', 'i', 'k', '4809', 'J', 'S', 'J', '4245', 'p', '1251', 'U', 'e']

k4809JSJ4245p1251U