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.
18, 25, ['e', 'n', 'L', '7829', '2143', 'a', 'H', 'u', 'L', '2161', 'z', '723', '681', '4925', 'm', 'a', 'u', '573', '7407', '7903', 'T', '2625', '6903', 'r', '3515', 'z', '4975', '3441', 'R']