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.
9, 18, ['2347', '9989', '8791', '8229', '857', '2409', '1317', 'x', '6021', 'U', 'n', '2875', '5691', '5515', '3763', '6039', 'b', 'X', '4001', '5169', '2067', '3793', 'l', 'Y', 'w', 'G', '5789', '2353']