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: 16, 27, ['H', 'e', '2643', '5015', '3065', '9689', '1905', 'x', 'i', '3037', '7323', '9835', '8739', 'L', 'k', 'm', 'F', '9921', 'R', '8447', '9963', 'u', '8257', '2525', 'p', 'i', 'x', 'i', '7869']

xip25258257u99638447R9921Fm