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: 21, 21, ['Q', 'f', '5151', 'X', 'L', '8027', '9247', 'p', '4753', '4937', '3163', '4045', '3549', '6523', 'K', 'K', '4847', '4025', 'E', 's', 'A', '3453', '8493', '1885']

A