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:
5, 18, ['u', '3123', 'g', 'r', 'M', '559', 'F', 'F', '3229', '3207', 'w', 'X', 'U', 'j', 'f', 'p', '7623', '6121', '2279', 'v']

Ex Output:
61217623pfjUXw32073229FF559M


Ex Input:
7, 7, ['5203', 'C', '929', 'r', '6435', 'p', '303']

Ex Output:
303


Ex Input:
1, 1, ['4295', '4771', '5811', 'C', '4527', 'P']

Ex Output:

4295