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.
6, 12, ['4343', 'A', '1769', '1741', 'A', '9457', 'B', '6329', '7667', 'p', 'z', '9333', '9423', '7221', '3161', '1947', '6681', '8411', 'u', 'K', '4885', '6379', 'L']