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:
2, 3, ['l', 'D', '6731', 'g', '4587', '6771', '8663', '3813', 'l']

Ex Output:
6731D


Ex Input:
2, 8, ['B', '6435', 'S', 'W', 'k', '1127', 'v', 't', 'G', 'N', '7331', 'O', 'b', 'V', '3141', 'E', 'L', 'F', '2333', 'y', '9783', 'u', 'T']

Ex Output:
tv1127kWS6435


Ex Input:
2, 12, ['K', '6103', 'B', '4563', 't', '6263', '4693', 'U', 'g', 'k', 'P', '8249', 'S', '9197', '8879', 'A']

Ex Output:

8249PkgU46936263t4563B6103