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.
16, 18, ['O', 'I', '7891', 'q', 'G', 'D', 'B', '6511', '8441', '3587', 'R', '6683', '1481', '5763', 't', 't', 'K', '8423', 'G', '7423', 'M', 's', 'a', 'X', 'O', 'r', 'I']