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, ['7479', '4013', '8595', '6133', '7785', '9021', '9595', 'u', '8801', 'x', 'M', '8905', '2783', 'D', 'w', '4691', 'z', 'b', '4143', '4209', 'b', 'Y', '7555', 'b', 'Y', '7809', '8123']