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]: 16, 20, ['7675', 'c', '9729', '8219', 'P', '9939', '9217', 'C', '4067', '549', 'g', 'w', '3793', 'I', 'U', 'R', 'S', '2615', 'h', 'M', '889']
[EX A]: Mh2615SR

[EX Q]: 4, 7, ['n', 'X', '7943', '49', 'm', '4459', 'O', 'a', '4759', '1551', 'c', '6053', '6213', '6997', '7613', '669', 'e']
[EX A]: O4459m49

[EX Q]: 5, 19, ['4735', '9935', 'H', '4837', '2109', 'U', 'G', '6561', '9939', '6739', '8737', 't', 'v', 'V', 'W', 'X', '3149', 'U', '4219', '7019', '9579', '1003', '5551', 'H', 'G', 'V', 'V', 'q']
[EX A]:
4219U3149XWVvt8737673999396561GU2109