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, 20, ['m', '9539', 'y', 'E', 'E', 'C', 'y', 'M', 'G', 'N', '4167', '2753', 'e', '8259', 'c', '6333', 'k', 'c', '471', '6461', 'w', '8919', '3849', 'm', 't', '6973', 'K']
[EX A]: 6461471ck6333c8259e27534167NGMyCEEy

[EX Q]: 1, 2, ['W', 'I', 'f', 'R', '7797', 'R']
[EX A]: IW

[EX Q]: 5, 6, ['4729', 'Q', 'E', 'E', 'U', 'E', 'q', '2149', 'Q']
[EX A]:
EU