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.

Ex 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']

Ex Output:
9219Df7938X7012E9626


Ex Input:
2, 4, ['B', '5601', 'v', '7431', 'z']

Ex Output:
1347v1065


Ex Input:
18, 19, ['8385', 'a', 'k', 's', '547', 'v', '1779', 'D', 'E', '9435', 'd', 't', 'i', 'X', 'S', '9763', 'B', '3509', '9095', '7157', 'C']

Ex Output:

59099053