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: 16, 21, ['s', '3701', 'I', '889', '1775', '2177', 'y', '9777', '3199', 'H', '2021', 'n', 'G', 'm', '8181', 'Y', '1981', 'z', '4889', '6019', 'V', 'z', 'r', 'j', 's', '7549', '3021', 'D']

V60194889z1981Y