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, 11, ['6989', 'a', '4293', '2651', 'x', 's', '5169', 'l', '7529', 'w', '477', '8857', 'X', 'w', '7791', '1845', 'K', 'X']

477w7529l5169s