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, ['X', 'r', 't', '6275', '2515', 'U', 'M', 'I', 'z', 'b', 'c', 'E', 'J', 'd', 'o', '8589', 'd', 'P', 'X', '7199', 'H', '521']

H, 7199