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: 13, 20, ['q', 'f', '9215', 'e', 'j', 'L', 'm', 'q', 'f', '6515', '9937', 'U', '2921', 'G', '1619', 'T', 'q', '9849', '2983', '5865', 'n', '609']

586529839849qT1619G2921