In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.

Ex Input:
4, 9, ['7691', '4539', '3381', 'b', 'g', '9615', '8187', '177', '2473', '8579', '9739', 'C', 'v', 'q', '2879', 'Z', '6817', '5247', '5477', 'Y', 'w', '3981']

Ex Output:
247317781879615gb


Ex Input:
19, 28, ['1857', '7871', 'N', 'j', 'f', 'y', 'F', 'M', '883', 'v', '7135', 'd', 'y', 'Z', 'K', '9301', 'm', '1725', 't', '1675', '6241', 'H', '5189', 'f', '2581', 'u', '465', '3677']

Ex Output:
3677465u2581f5189H62411675t


Ex Input:
3, 3, ['9141', '8967', 'n', 's', 'j']

Ex Output:

n