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: 1, 20, ['v', '9281', '6167', '8669', 'B', '6513', 'X', 'z', '3691', 'r', '2171', '3441', 'n', 'X', 'B', '1801', 'r', '5823', '2787', '3471', '8039']

347127875823r1801BXn34412171r3691zX6513B866961679281v