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: 6, 21, ['1119', '6479', '8939', 'e', '1799', '9457', 'N', 'L', 's', 'H', 'D', 'O', '6387', 'G', '9265', '8453', 'K', '131', '5085', 'V', '3481']

3481V5085131K84539265G6387ODHsLN9457