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, ['4735', 'x', 'G', '1431', '7953', 'x', 'P', 'k', 'h', '6451', '3579', 'V', 'q', 'G', 'R', 'U', 'D', '5037', 'M', '1095', '5777', 'q', '1531', 'L', '8205', '5553', '6071', 'v', '8019']

RUD5037M10955777