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: 15, 17, ['u', '7219', 'B', '85', 'p', 'q', 'r', '6989', '4777', 'O', '4059', 'y', 'M', '607', '7291', '2953', '8199', '1671', '5881', '2939', '8813', '3225', '8773', '3251', '3651', 'g']

819929537291