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, ['o', 'P', 'A', '2069', '989', '6501', 'A', 'U', 'r', 'b', '7911', 'h', 'f', 'R', 's', '2059', 'c', '6849', '5791', '233', '8411', 'v']

sRfh7911brUA