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.
1, 4, ['8439', 'W', '6859', '1367', '8099', '6293', 'U', 'A', '4027', 'w', 'n', 'f', 'e', 'x', '2839', '871', 'T', '7637', 'c', '9187', 'w', '4067', '4185', 'T', 'O', '3621', 'h']