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.
11, 21, ['8183', 'z', '8319', '7091', 'z', 'p', 'S', '8633', '8515', 'L', '4907', 'y', 'U', 'r', '7881', 'x', '5189', '9525', '4205', 'U', '3105']