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: 21, 28, ['8641', 'o', '1301', '8225', '8079', 'Y', 'O', '9571', 'n', 'Q', 'n', 'W', '6555', 'm', 'A', 'A', '4459', '5983', '5469', 'd', '6269', 'E', '2107', 'X', '8397', 'f', 'D', '9129']
Example Output: 9219Df7938X7012E9626

Example Input: 1, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']
Example Output: RJ9069R73221503P3353198c9647v794

Example Input: 2, 2, ['s', 'Z', '4985', '9727', 'v', 'x', 's']
Example Output:
Z