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: 2, 7, ['v', 'b', 'n', '2411', '5705', '3615', '7753', 'h', '1021', 'l', '3085', '241', 'W', '4427', 'c', 'K', '2401', '6973', 'a']

7753361557052411nb