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, 22, ['2637', '6921', '4415', '5321', '1741', 'N', '2835', '8659', '7633', 'A', 'h', '9873', 'g', '3417', '5689', 'o', 'U', '1435', '7331', 'Z', 'N', 'W', '7765', 'I', '1259', '1867', 'k']