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, 8, ['s', '8395', '7689', 'x', 'P', '5953', 'X', 'D']
Example Output: DX3595Px9867

Example Input: 2, 3, ['T', '2161', '227']
Example Output: 7221612

Example Input: 16, 16, ['9425', '1323', 'k', '4331', 'q', 'f', 'R', '1791', 'i', 'p', '7601', 'w', '5551', 'X', '9467', 'x', 's']
Example Output:
x