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: 4, 19, ['I', 'h', 'D', 'd', 'e', 'X', 'h', '2821', 'y', '2537', '2345', 't', 'I', 'i', 'D', '543', '2469', 'j', 'V', 'U', '8523', '605', 'J', '6675', '8559', 'n']
Example Output: Vj9642345DiIt54327352y1282hXed

Example Input: 1, 5, ['M', 'H', '7813', '6149', 'u', 't', '3643', '5901', 'A', 'g', '3929', 'V']
Example Output: u94163187HM

Example Input: 6, 20, ['y', '3253', 'w', 'C', 'j', '2671', '8107', '4481', 'B', 'l', '7797', '6549', '7431', '5353', '3515', 'V', '8099', '2505', '8847', 'M', 'e']
Example Output:
M748850529908V51533535134794567977lB184470181762