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:
13, 15, ['L', 'A', '2959', 'g', '7157', '9131', 'o', 'D', 'q', 'd', 'A', '4249', 'K', 'U', '4805', 'h', '7981']

Ex Output:
5084UK


Ex Input:
5, 5, ['8095', 'D', '9477', '9307', '9355', 'U', 'y', '5197', '2691', '3061']

Ex Output:
5539


Ex Input:
7, 14, ['X', '1709', '3765', 'K', 'w', 'F', '6813', 'b', 'e', '2577', 'b', 'f', '4789', '1053', 'Y', 'c', '8641', '7219', '1279', '3991', 'd']

Ex Output:

35019874fb7752eb3186