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: 7, 9, ['5683', 'M', '3363', 'H', '161', '6767', 'w', 'j', 't']
Example Output: tjw

Example Input: 1, 1, ['f', 'E', 'G', '9657']
Example Output: f

Example Input: 5, 16, ['6603', '9173', 'r', '8643', 'Q', '5071', 'Q', '8715', 'm', 'g', '9969', 'O', 'x', 'Q', 'c', 'R', '2497', '7975', 'O', '3437', 'E', '7461', '8619', '6799', 'b', '925']
Example Output:
RcQxO9699gm5178Q1705Q