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:
1, 2, ['L', '7723']

Ex Output:
3277L


Ex Input:
2, 4, ['i', '2555', 'G', '4549', 'a', '7443', '5361']

Ex Output:
9454G5552


Ex Input:
1, 7, ['4169', '2953', 'B', 'z', 'o', '1285', 'V', '9241', '9659', 'b']

Ex Output:

V5821ozB35929614