In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.
--------
Question: 2, 4, ['4047', 'S', '4249', '1735', '207']

Answer: 53719424S


Question: 3, 8, ['s', '8395', '7689', 'x', 'P', '5953', 'X', 'D']

Answer: DX3595Px9867


Question: 17, 20, ['3477', 'T', '2495', 'f', 'a', 'Z', 'L', 'r', 'M', 'C', '5635', '211', '3235', '5317', '5109', 'J', 'W', '8207', '9297', 'E', '4275', '2733']

Answer:
E79297028W