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, 19, ['k', '8749', '6663', '8151', 'T', '9737', 'n', '2491', '727', '6797', 'g', '7979', '4503', '9203', '2631', '6597', 'b', 's', '1431', 'C', 'b', 'Z', '2467', '3927', '1341', '1299', 'T', 'U']

1431sb65972631920345037979g6797