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: 3, 19, ['9159', '3153', 'U', '51', '2349', '3777', '5609', '8473', '1159', 'k', '403', 'z', 'h', 'm', '4577', 'n', 'v', 'b', '6831', 'd', '4803', '2517', '9547', 'F']

6831bvn4577mhz403k1159847356093777234951U