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 list all elements of A from the ith element to the jth element in the reverse order. 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.
Input: 20, 21, ['W', '2343', 'N', '4151', '7643', 'O', '9801', '9995', 'D', '6549', 'X', 'M', '6427', '8103', 'f', 'O', '2751', 'I', 'r', 'q', 'm', '789', 'Q', 'L', 'm', '83', 'L']

m, q