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 Q]: 3, 3, ['U', '8399', '645', '3165']
[EX A]: 645

[EX Q]: 2, 14, ['621', 'C', 'Y', '7681', '9283', '8389', 'T', 'V', 'u', 'y', '3235', 'w', '3393', '7343', 'j', '1139', 'I', 'Z', '6575', 'g', 'U', 'M', '6373', 'J', 'r']
[EX A]: 73433393w3235yuVT838992837681YC

[EX Q]: 1, 6, ['J', 'G', '7587', '8935', '1951', '8877', '4839', 'I', '7737', '7211', '6571']
[EX A]:
8877195189357587GJ