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.

Ex Input:
16, 19, ['g', 'c', '157', '7487', 'Q', 'x', '7719', '3859', 'O', '4597', 'Q', 'o', '103', 'n', '1513', 'n', '1667', '6417', 'i', '2685', '1259', '6483', '4381', 'g', 'c', '3849', 'Q', '6591']

Ex Output:
i71467661n


Ex Input:
9, 16, ['I', 'j', 'I', 'W', 'f', '5511', '1989', 'K', '423', '593', '6283', '2699', '8375', '8757', '9561', 'o', '3371', '6349', 'N', '4835']

Ex Output:
o16597578573899623826395324


Ex Input:
1, 1, ['n', '5183', 'e']

Ex Output:

n