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.
16, 18, ['f', 'm', '6405', 'Q', 'l', 'Z', 'L', 'a', '2755', '2937', '9385', 'u', 'C', '3975', '1423', 'd', 'D', 'x', 'Y', 'O', 'J', 'r', '2775', 'F', 'O', 'n', 'M']