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.
3, 7, ['U', 'X', '9663', '8383', '9319', 'Q', '8943', '2513', '7169', 'B', '3781', 'W', 'L', '5293', 'L', '1883', '3653', 'l', '8335', '8799', '5119', '505', '6051']