In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

Input: Consider Input: 11, 15, ['807', '2753', 'L', '8633', '7203', 'j', 'a', 'r', 'R', 'q', 'g', 'B', 't', '1373', '3371', 'S', '9977', 'y']

Output: 17333731tBg


Input: Consider Input: 1, 5, ['7115', '3109', '3805', '6831', '6897', 'y', 'b']

Output: 79861386508390135117


Input: Consider Input: 1, 2, ['D', '1803', 'K']


Output: 3081D