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.
20, 26, ['1449', 'A', '513', 'Y', 'l', 'q', '6447', 'a', '7065', 'r', '7669', '1465', '1485', 'm', 'U', '1315', 'R', 'Z', 'd', 'S', 'D', '9685', '2031', '805', '6819', 'O', '2905', 'Z', 'C']