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, 19, ['m', '7871', '7339', 's', 'g', 'R', '3981', 'D', '2951', '869', 'c', '9175', 'f', '443', 'D', '1867', 't', 'g', 'u', '8367', '991', '259', '6641', '1011', '5971']