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: 19, 20, ['d', '6831', 'u', '1115', '9665', 'i', '6205', '1981', 'D', 'b', '825', '9285', 'u', '2865', 'A', 'f', 'H', 'S', '9937', 'A', '2807', '7867', '1389', '5625', 'G', '9353']

A9937