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: 5, 15, ['8239', '6079', 'g', 'U', 'U', '291', 'w', '6621', '5715', 'j', '2513', '8437', '6031', '7239', '7523', 'p', '1349', '9477', 'd', '799']

75237239603184372513j57156621w291U