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:
2, 2, ['a', 'J']

Ex Output:
J


Ex Input:
17, 18, ['1795', '6295', '9741', '1375', '8077', 'y', '6465', 'q', '889', 'E', 'N', 'S', '6665', 'H', '2343', 'J', '3369', '5475', 'e', '9991', 'B', 'E', '2317', 'a', 'T', '7337', 'G', '2469', 'D']

Ex Output:
57459633


Ex Input:
4, 13, ['c', 'D', '3759', 'a', '3913', 'B', '1279', 'p', 'x', 'x', 'R', 'X', '4239', '6261', 'Y']

Ex Output:

9324XRxxp9721B3193a