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: 2, 18, ['t', '6679', '8403', 'o', 'o', '1803', '533', '2565', 'B', '4711', '9893', '3461', '7921', '9515', 'Y', '5667', '3331', 'W', '8327', 'Y']

W33315667Y95157921346198934711B25655331803oo84036679