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. 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: 12, 13, ['9303', '7643', 'W', '1885', 'F', '4439', 'H', 'A', 'b', 'b', 'k', 'W', 'U', '5117', '2993', '7115', 'm', '9873']

W, U