Definition: 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.
Input: 9, 17, ['r', '9243', '3927', 'y', '299', 'C', 'w', 'b', 'a', 'Y', 'b', 'H', '4503', 'L', '5739', 'b', 's', '8549', '5037', 'N', 'J', 'K']

sb5739L4503HbYa