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.

1, 4, ['s', 'n', '6721', 'W', 'H']
W6721ns

4, 4, ['8643', '8469', '9265', 'i', 'P', '3633', 'A', 'g', 'l']
i

9, 20, ['S', '2419', '3289', '5523', 'N', 'u', 's', '4259', 'X', 'Y', 'K', 'R', 'o', 'k', 'z', 'w', '2323', 'w', '4823', '955', 'r', '9895', 'X', '9897', 'U', 'O', 'n', 'z', '2841', '3887']

9554823w2323wzkoRKYX