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.
27, 28, ['2473', '7889', 'X', 't', 'D', '1539', '8509', 'k', 'K', '7333', '2299', '6301', '5213', '6393', 'n', '6507', 'Z', 'p', '797', 'Q', '4041', '1967', 'W', '277', 'J', 'e', 'I', '6069']