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, ['8097', '3167', '809']

Ex Output:
908


Ex Input:
18, 22, ['I', '4687', 'V', 'y', 'U', '2255', '6971', '793', 'W', 'O', '3233', '5061', '6355', 'X', 'U', '8435', 'e', 'z', 'u', '6055', 'd', '1493', 'e', '4453', 'X']

Ex Output:
3941d5506uz


Ex Input:
10, 19, ['R', '181', '7833', '5439', 'r', '1271', 'E', '5207', '4375', 'C', '5549', 'J', '7035', 'l', 'T', '8209', 'C', 'k', '3445', '8547', 'b', 'G', 'm', '7409']

Ex Output:

5443kC9028Tl5307J9455C