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, 6, ['z', 'b', '2697', 'W', '1449', 'x', '5327']

Ex Output:
x9441W7962


Ex Input:
10, 11, ['5441', 'k', '9573', '4937', '7305', '2303', 'P', 'P', 'N', '2549', 'C', '5865', 'M', '9033', 'k', 'A']

Ex Output:
C9452


Ex Input:
15, 15, ['3945', 'z', '4779', 'd', 'v', 'R', '6285', 'c', '9745', '4641', 'W', '4359', '9637', 'd', '4427', '2013']

Ex Output:

7244