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.
12, 26, ['3871', 'n', 'E', '4383', 'W', '5505', '5355', 'l', 'Z', 'd', 'Q', '3469', '419', '57', 'M', '3865', 'J', 'r', '1821', 'I', 'C', 'b', 'i', 'K', 'M', 'B', 'U', '3713', '2207', '5113']