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: 17, 21, ['6555', 'G', 'e', '1819', '7653', '7093', '4109', '2401', '6205', '6701', '4457', 'L', '8781', '6211', 'U', 'q', '6729', '4559', '5973', 'S', 'h', '8899', 'C', 'w', '979']

hS597345596729