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:
13, 13, ['1771', 'u', 'w', 'k', 'P', '7297', 'Y', '2223', 'X', 'u', '3067', '19', 'w', 'A', 'b', '4309', 'O', '7215', 'z', '6609', '4479', '3149', '6829', '8597', '4829']

Ex Output:
w


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

Ex Output:
I


Ex Input:
1, 7, ['B', '2131', '4009', 'R', '9677', 'x', 'F', 'n', '4037', '2489', '6267', 'C', 'x', 'Y', '259', '6649', '4007', 'k', 'c', 'T', 'o', '5607', 'i', 'g', 'U', '7607', '4647']

Ex Output:

Fx7769R90041312B