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.
6, 9, ['b', '3477', '7513', 'c', '6391', '99', '6945', '5319', '7541', '131', '3461', 'r', '5415', 'k', '4165', 'a', 'g', 'k', '4569', 'K', 'K', '2899', '7077', '3313', '5665', '1355', '1583', '5133', 'f', 'W']