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, 21, ['2245', '7355', 'k', '3959', '5641', 't', '9095', '7763', '8571', 'W', 'm', 'z', 'G', '7599', '1433', 'F', 'w', '1083', 'B', '5627', 'U', 'b']

U5627B