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: 21, 28, ['955', 'n', '3289', '1989', '6329', 'X', 'N', '3291', 'b', '3215', '9467', 'F', '3701', 'L', 'Z', '9503', '577', 'o', 'm', '9509', 'G', '5799', '3755', 's', '8383', '2605', '8313', 'u', 'n']

u831326058383s37555799G