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

11, 11, ['2369', 'J', '5461', '5037', 'L', '3003', 'K', 'g', '5417', 'Q', '3309']
3309

7, 10, ['3359', 'u', 'V', '7739', '5797', '4523', '8449', 'q', '9875', 'h', 'q', 'Y', 'Z', 'M', 'V', '9805']

h9875q8449