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: 14, 21, ['127', 'y', 'x', 'i', 'Z', 'l', '1427', 'O', '2291', 'P', '429', '4115', 'C', 's', '4065', 'M', '6453', 'C', '9475', 'Q', '6545', 'j', 'W', '7117', 'h', '7965', 'U', '5121', '3381', '4175']
Example Output: 5456Q5749C3546M5604s

Example Input: 5, 5, ['m', '1577', '7895', 'l', 'K', '2981', '8677']
Example Output: K

Example Input: 10, 16, ['I', 'I', 'O', '7813', '8951', 'y', '4613', '2067', '2683', '651', '5485', '3931', '9', 'M', 'S', 'X', 'C', '2119', '1631', 'z', '735', '3935', 'j', 's', '8195', '4347', '1195', 'm', 'V']
Example Output:
XSM913935845156