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: 3, 8, ['T', 'J', 'P', 'U', '9887', 'u', 'n', '8911', '6737', 'W', '503', 'E', '8917', 'W', '7721', '4191', '6091', '4995', 'r', 'E']

PU9887un8911