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:
7, 9, ['c', '5457', '1035', 'G', '8985', '3477', 'd', '7679', '6753', '6463', 'U', 't', 'F', '5305', '7807']

Ex Output:
67537679d


Ex Input:
8, 16, ['O', 'e', '5857', '6759', '9787', 'e', 'j', '9173', 's', '4135', 'j', 'I', 'g', 'f', '2129', 'n', '3337']

Ex Output:
n2129fgIj4135s9173


Ex Input:
3, 4, ['7637', '8569', 'M', 'P', '1621', '8233', '5869', '4983', 'v', '531', 'M']

Ex Output:

PM