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.
26, 27, ['Z', 'c', 'G', 'd', '4543', '4403', 'a', 'n', 'b', 'Y', 'A', 'F', '6979', '2369', 'f', '7009', 'Y', '2939', 'w', 'r', '4755', 'l', '7777', 'C', 'I', '3951', '6713']