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, 12, ['8437', 'D', '2251', '2269', 'r', '7279', 'O', '2955', '6663', '4905', '6903', 'Y', 'g', '3495', 'l', '5963', '1507', '4207', 'I', 'H', 'g', 'f', '4131']