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:
4, 4, ['8393', '8873', '6317', 'N', '2549']

Ex Output:
N


Ex Input:
18, 22, ['I', 'F', 'Y', 'Q', 'C', '333', '6051', '7461', 'm', '311', '3835', '8833', '8925', 's', 'o', '4279', 'r', 'N', 'x', '2923', 'Z', '9297', '2883', 'z']

Ex Output:
7929Z3292xN


Ex Input:
1, 2, ['G', '3939', 'Q']

Ex Output:

9393G