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.
5, 21, ['3567', '4463', '4145', 'k', '8203', '9613', 'R', 'a', '5593', '5673', 'f', '7525', '6043', '2901', 'L', '8477', '5081', 'M', '2531', '1917', 'W', '5913', 'O', 't', '9813', 'x', '7027']