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: 10, 20, ['D', '9801', 'z', 'c', 'o', 'k', 'm', 'D', '687', 'v', '1997', '7563', '3089', '8059', '1325', '3649', '825', 'f', '6019', 'J', 'c', 'J', 'J', '3657']

J6019f825364913258059308975631997v