Detailed Instructions: 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.
Q: 20, 21, ['677', '3179', '6893', 'j', '6591', 'o', 'G', '5571', 'N', 'f', '8329', '8815', '941', '451', 'O', '5125', '4761', 'Z', '8147', '3999', '1243', '2625', '8645', '7207', 'u', '1041', '1467']
A:
12433999