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:
2, 2, ['G', 'S']

Ex Output:
S


Ex Input:
1, 2, ['t', '1143', '4747', 'E', 'v', 'L', '451', '7367', 'O', 'T']

Ex Output:
3411t


Ex Input:
11, 17, ['l', '271', '9447', '4999', '4899', '8863', '6609', 't', '6187', '8011', 'L', '8795', 'O', '9747', 'z', '2863', 'r']

Ex Output:

r3682z7479O5978L