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:
3, 3, ['x', 'v', 'p', '4337', '635', '8927', 'B']

Ex Output:
p


Ex Input:
3, 6, ['95', '1973', 'L', '8811', '2655', '2661', 'v', 'a', '1115', '7687', '8807', 'r']

Ex Output:
166255621188L


Ex Input:
5, 7, ['S', 'E', 'o', 'D', 'X', '8011', 'M', 'E', '3185', '3061', '9837', '3717', '6975', 'B', 'M', '4031', 'l', 'R', '3815']

Ex Output:

M1108X