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: 7, 15, ['Q', '9703', '7559', 'u', 'O', 'w', 'A', 'j', 'y', 'N', 't', '7597', '8669', '6915', '6259']

6259691586697597tNyjA