Teacher: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.
Teacher: Now, understand the problem? Solve this instance: 14, 20, ['i', '9955', '9261', '8979', '2157', 'T', 'D', '1101', '1631', 'Q', 'I', 'h', '2123', '715', '851', 'A', '1963', '1935', 'A', '9623', '5203', 'X', '4249', 'M', '9019', 'r', '9073']
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
9623A19351963A851715