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:
1, 2, ['A', '8103', '7829']

Ex Output:
3018A


Ex Input:
2, 2, ['8679', 'G', '1819']

Ex Output:
G


Ex Input:
9, 13, ['q', '3423', 'r', 'H', '3471', 'm', 'E', 'p', 'y', 'x', 'm', '813', '6477', '6739']

Ex Output:

7746318mxy