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 find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output 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. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.
Input: 15, 21, ['F', '4531', '843', 'L', 'v', 'V', 'w', 'n', 'B', '3145', '3365', '6745', 'h', '6625', '5599', '7151', 'v', 'K', '7517', '4917', 'D', 'S', 'q', '7207', '8891', '4481']

D49177517Kv71515599