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.
2, 21, ['355', '6703', 'H', 'N', '8337', '7715', '5017', 'O', 'H', '4583', '5209', '4013', 's', '3563', 'z', 'p', 'K', '5631', 'G', 'B', '8933', '6565', '4965', 'D', 'c', '6315']