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.

Example Input: 3, 5, ['j', '239', '9689', 's', 'C', 'w']
Example Output: Cs9869

Example Input: 9, 19, ['5843', 'b', '161', 'Z', 'h', '2323', '25', 'S', 'Z', 'A', 'l', 'R', 'O', '4543', 'd', 'J', '1667', 'I', 'N', 'K', 'T', '2767', '4409', 'B']
Example Output: NI7661Jd3454ORlAZ

Example Input: 6, 27, ['3889', '7069', '3245', 'X', '3425', 'b', 'R', '4345', '8701', 'B', 'k', '543', 'G', 'A', '4167', 'z', '1395', '9197', '3883', 't', 'q', '6305', '6233', 'V', '7127', 'j', 'g']
Example Output:
gj7217V33265036qt388379195931z7614AG345kB10785434Rb