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:
5, 5, ['4733', 'G', '9275', '7757', 'I', 'v', 'z', 'p', 'Z']

Ex Output:
I


Ex Input:
18, 18, ['O', '7845', 'f', '2313', 'f', '9661', 's', 'O', '6009', '6997', 'f', 'T', 'f', '6517', 'E', 'H', 'k', 'Y', 'i', '2839', '1839', '3251', 'H', '1939']

Ex Output:
Y


Ex Input:
10, 11, ['t', 'K', '8031', '7539', '459', 'T', '859', 'h', '819', '4511', 'r', '5825', '3635']

Ex Output:

r1154