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.
1, 12, ['S', 'h', 'l', 'M', '6859', '5419', 'm', '7981', 'n', '6003', 'b', 'F', '8517', '3239', 'T', 'E', 'i', '6731', 'K', '7121', '1689', 'y', 'Y', 'P', 'l', 'b']