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, 12, ['n', '1995', '9023', '6583', 'e', '1551', '1189', '451', 'I', '9021', '9823', '2777', 'u', '9695', 'p', 'C', '3255', '79', '6763', 'a']
[EX A]: 277798239021I45111891551e65839023

[EX Q]: 1, 5, ['9533', '9671', '6871', 'S', '4865']
[EX A]: 4865S687196719533

[EX Q]: 3, 4, ['m', 'a', '7399', '8559', '6491', '8857', '9785', '6803', 'j', '9529', '597', 'B', '6049', '8475', 'n', '1465', '857', '6305', '6135']
[EX A]:
85597399