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:
19, 20, ['x', '6239', 'D', 'l', 'Y', 'd', '6405', 'l', '2629', '4743', '8271', '3749', 'W', 'r', '9153', '2941', '6477', '2623', 'F', 'J']

Ex Output:
JF


Ex Input:
3, 17, ['W', 'X', 'k', '6881', 'R', 'f', 'E', '1657', '801', '271', 'a', 'b', 'C', 'i', 'a', '4329', 'a', '847', 'C', 'c', 'D', '8007', 'V', 'U', 'k']

Ex Output:
a4329aiCba2718011657EfR6881k


Ex Input:
9, 14, ['4883', '8307', 'T', '4101', '281', '4799', 'T', '3081', 'W', '6945', 'z', '8705', '8529', '9807', 'Q', '4819', '467', '9023', '831', '2021', '3409', '33', '6439', 'z']

Ex Output:

980785298705z6945W