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: 6, 14, ['6261', 'x', '8425', '8735', '3503', '8085', 'Z', 'Q', '9647', '4777', '4399', '2835', 'J', '9917', 'P', '4761', 'C']

9917J2835439947779647QZ8085