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:
3, 3, ['6041', '1503', 'z', '6947', 'W', '3563', '6477', 'h', '8977', 'e', 'z', '5605', '3595', '9327', 'M', 'l', 'j', 'P', 'D', 'h', 'S', 'Q', 'o', '2539', 'a', 'J', 'd', 'k']

Ex Output:
z


Ex Input:
7, 9, ['w', 'L', '7649', 's', 'D', '45', 'L', 'O', 'H', '2781', '6883', 'h']

Ex Output:
HOL


Ex Input:
1, 7, ['Q', '5115', '4333', '1155', 'W', '7471', 'q', '1201', 'W', 'Q']

Ex Output:

q1747W551133345115Q