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, 4, ['t', '6037', 'I', '2769', 'C']

Ex Output:
9672I7306t


Ex Input:
1, 1, ['T', 'Y']

Ex Output:
T


Ex Input:
11, 18, ['L', 'P', 'j', 'z', 'X', 'U', '1337', '6977', 'q', 'q', '2669', '3857', '6219', 'y', '7427', '5071', 'x', 'T', '1221', 'v', 'M', '5373', '7711', 'E']

Ex Output:

Tx17057247y912675839662