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: 15, 21, ['J', 'l', '5285', '69', 'I', 'I', 'u', '8413', '2475', '1673', 'A', 'L', '5197', 'E', 'p', 'D', 'B', '4501', 'V', 'z', 'G', '3831']

pDB4501VzG